Universe Today

October 30, 2013December 23, 2015 by Bob King

Four Comets Haunt the Halloween Dawn! Here’s How to See Them

No fewer than four bright-ish comets greet skywatchers an hour before the start of dawn. From upper left counterclockwise: C/2013 R1 Lovejoy, 2P/Encke, C/2012 X1 and ISON. Credits: Gerald Rhemann, Damian Peach, Gianluca Masi and Gerald Rhemann

Get your astronomical trick-or-treat bags ready. An excursion under the Halloween morning sky will allow you fill it in a hurry — with comets! We’ve known for months that ISON and 2P/Encke would flick their tails in the October dawn, but no one could predict they’d be joined by Terry Lovejoy’s recent comet discovery, C/2013 R1 (Lovejoy), and the obscure C/2012 X1 (LINEAR). The last surprised all of us when it suddenly brightened by more than 200 times in a matter of days. Almost overnight, a comet found on precious few observing lists became bright enough to see in binoculars. Now comet watchers the world over are losing sleep to get a glimpse of it.

Rarely are four comets this bright in the same quadrant of sky. This map shows the sky facing east about two hours before sunrise on Oct. 31. Notice that three stars are labeled "Beta". These are (from top) Beta Cancri, Beta Leonis and Beta Coma Berenices. We'll use these three stars and the planet Mars to hone in on the comets' locations in the maps below. Stellarium — Rarely are four comets this bright in the same quadrant of sky. This map shows the sky facing east about two hours before sunrise on Oct. 31. Take note of the three stars are labeled “Beta”. These are (from top) Beta Cancri, Beta Leonis and Beta Coma Berenices. We’ll use these three stars and the planet Mars to hone in on the comets’ locations in the maps below. Stellarium

Since it’s unusual to have four relatively bright comets in the same chunk of sky at the same time, you don’t want to miss this opportunity. Now that the moon has dwindled to the slightest crescent, this is THE time to hunt for these ghostly apparitions before dawn.

etailed (updated) map showing Comet Lovejoy's progress across Cancer in the coming days. It passes very close to the Beehive Cluster on Nov. 6-7. Click for a larger version you can print and use under the stars. All dates are at 6 a.m. CDT; north is up and west to the right and stars are shown to mag. 5. All closeup charts created with Chris Marriott's SkyMap software — Detailed (updated) map showing Comet Lovejoy’s progress across Cancer in the coming days. It passes very close to the Beehive Cluster on Nov. 6-7. Click for a larger version you can print and use under the stars. All dates are at 6 a.m. CDT; north is up and west to the right and stars are shown to mag. 5. All closeup charts created with Chris Marriott’s SkyMap software

Brightest of the bunch at magnitude 8 and your best bet to see in a standard pair of 50mm binoculars is Comet Lovejoy. Using the maps, look for a round, fuzzy spot with a brighter center not far from the bright star Procyon in Canis Minor. In the coming days, Lovejoy will brighten by an additional 2 to 3 magnitudes as it trucks across Cancer headed toward the Big Dipper. This is one to watch. Lovejoy will likely reach naked eye brightness by mid-November. Small telescope users can see the comet with ease but its developing gas tail is still to faint to spot visually.

Comet Encke drops below Leo and into Virgo over the next two weeks. Your guide star Beta Leo is at upper right. Click to enlarge. — *Comet Encke drops below Leo and into Virgo over the next two weeks. Your guide star Beta Leo is at upper right. Stars to mag.8. Click to enlarge.*

Comet Encke treks around the sun every 3.3 years. Sometimes it’s well placed for viewing and sometimes not. Because of its short period, dedicated comet watchers meet up with it a half dozen or more times during their lives. This apparition is a favorable one with the comet well-positioned in the east at dawn near peak brightness. Current estimates place it magnitude 7.5-8 with only the wispiest of tails. Like Lovejoy, 50mm binoculars under a dark sky should nab it.

A week before Encke reaches its peak magnitude of 6 or 7 at perihelion on Nov. 21, it chases the into the glare of morning twilight. If you want to see this comet, you’ve got about 2 weeks of viewing time left. Make sure to set up in a place with an open view to the east-southeast or you’ll find it hidden by the treeline.

Animation from images taken Oct. 25-28 of comet C/2012 X1 (LINEAR) showing its rapidly expanding coma in the wake of an eruptive event in its icy crust. Click image to animate. Credit: Gianluca Masi — Animation from images taken Oct. 25 and 28 of comet C/2012 X1 (LINEAR) showing its rapidly expanding coma in the wake of an eruptive event in its icy crust. Click image to animate. Credit: Gianluca Masi

Comet C/2012 X1 would have deprived us of a unique sight had it followed the rules. Instead, an eruption of fresh, dust-laden ices from its surface blasted into space to form a gigantic glowing sphere of material that vaulted the comet’s magnitude from a wimpy 13.5 to a vol-luminous 7.5. That’s a difference of 6 magnitudes or a brightness factor of 250 times!

Outbursts of this consequence are rare; the best example of a similar blow-out happened in 2007 when Comet 17P/Holmes cut loose and brightened by half a million times from magnitude 17 to 2.8 in just under two days.

C/2012 X1 (LINEAR) hovers low in the northeast in Coma Berenices near Beta. Because it's much further from Earth than the other 3 comets it moves more slowly across the sky. Click to enlarge. — C/2012 X1 (LINEAR) hovers low in the northeast in Coma Berenices near Beta. Because it’s much further from Earth than the other three comets, it moves more slowly across the sky. It has a close conjunction with the brilliant star Arcturus in mid-November. In this map, north is at top left and west to top right. Stars to mag. 8. Click to enlarge.

As with any explosion, the cloud of debris around C/2012 X1 continues to expand. Presently measuring a healthy ~8 arc minutes in diameter (1/4 the size of the full moon), the comet will almost certainly continue to grow and fade with time. Catch it now with binoculars and small telescopes before its veil-like coma thins to invisibility. Like Encke, X1 LINEAR requires an open eastern horizon and best viewed at the start of dawn. Make it the last comet on your observing list after Lovejoy, Encke and ISON.

Mars and several other moderately bright stars in Leo will guide us to Comet ISON in the next week or two. Click to enlarge. — *Mars and several other moderately bright stars in Leo will guide you to Comet ISON in the next week or two. Stars to mag. 10. Click to enlarge.*

Ah, ISON. Halloween morning wouldn’t be complete without a visit to this year’s the most anticipated comet.. If it can hold itself together after a searing graze of the sun on November 28, the comet will undoubtedly become a most pleasing sight during the first three weeks of December. Right now it’s a little behind schedule on brightness, but don’t let that worry you – its best days are still ahead.

*One of the finest pictures to date of Comet ISON by ace astrophotographer Damian Peach taken on Oct. 27.*

Of our four morning treats, Comet ISON is currently the faintest at around magnitude 9.5. Observers with binoculars in the 70-100mm range will see it under dark skies but most of us will need a 6-inch or larger scope at least until mid-November. That’s when ISON’s expected to brighten to magnitude 6, the naked eye limit. Just before it slips into the solar glare, ISON could reach 3rd magnitude around Nov. 21, normally an easy catch with the naked eye, but low altitude will hamper the view.

So open your bag wide tomorrow before dawn and keep it open the next few mornings. Trick or treat!

October 29, 2013December 23, 2015 by Ken Kremer

Damaged Dream Chaser Can be Fixed and Program to Move Forward with Flight Tests – Video

Left landing gear failed to deploy as private Dream Chaser spaceplane approaches runway at Edwards Air Force Base, Ca. during first free flight landing test on Oct. 26, 2103. Credit: Sierra Nevada Corp. See video below

Left landing gear tire visibly failed to deploy as private Dream Chaser spaceplane approaches runway at Edwards Air Force Base, Ca. during first free flight landing test on Oct. 26, 2013 – in this screenshot. Credit: Sierra Nevada Corp.
Watch approach and landing test video below[/caption]

The privately built Dream Chaser ‘space taxi’ that was damaged after landing during its otherwise successful first ever free-flight glide test on Saturday, Oct 26, is repairable and the program will live on to see another day, says the developer Sierra Nevada Corp., (SNC).

The Dream Chaser engineering test vehicle skidded off the runway and landed sideways when its left landing gear failed to deploy at the last second during touchdown on runway 22L at Edwards Air Force Base, Calif., said Mark Sirangelo, corporate vice president for SNC Space Systems, at a media teleconference.

The primary goal of the Oct. 26 drop test was to see whether the Dream Chaser mini-shuttle would successfully fly free after being released by an Erickson Air-Crane from an altitude of over 12,000 feet and glide autonomously for about a minute to a touchdown on the Mojave desert landing strip.

“We had a very successful day with an unfortunate anomaly at the end of the day on one of the landing gears,” said Sirangelo.

Dream Chaser is one of three private sector manned spaceships being developed with funding from NASA’s commercial crew program known as Commercial Crew Integrated Capability (CCiCap) initiative to develop a next-generation crew transportation vehicle to ferry astronauts to and from the International Space Station – totally lost following the space shuttle retirement.

Following helicopter release the private Dream Chaser spaceplane starts glide to runway at Edwards Air Force Base, Ca. during first free flight landing test on Oct. 26, 2013 - in this screenshot. Credit: Sierra Nevada Corp. — Following helicopter release the private Dream Chaser spaceplane starts glide to runway at Edwards Air Force Base, Ca. during first free flight landing test on Oct. 26, 2013 – in this screenshot. Credit: Sierra Nevada Corp.

The unmanned approach and landing test (ALT) accomplished 99% of its objectives and was only marred by the mechanical failure of the left tire to drop down and deploy for a safe and smooth rollout.

SNC released a short 1 minute video of the test flight – see below – showing the helicopter drop, dive, glide and flare to touchdown. The failure of the landing gear to drop is clearly seen. But the video cuts away just prior to touchdown and does not show the aftermath of the skid or damage to the vehicle.

“The Dream Chaser spacecraft automated flight control system gently steered the vehicle to its intended glide slope. The vehicle adhered to the design flight trajectory throughout the flight profile. Less than a minute later, Dream Chaser smoothly flared and touched down on Edwards Air Force Base’s Runway 22L right on centerline,” said SNC in a statement with the video.

The vehicle is “repairable and flyable again,” Sirangelo noted.

More good news is that the ships interior was not damaged and the exterior can be fixed.

Dream Chaser measures about 29 feet long with a 23 foot wide wing span and is about one third the size of NASA’s space shuttle orbiters.

Since there was no pilot in the cockpit no one was injured. That also meant that no evasive action could be taken to drop the gear.

“We don’t think it’s actually going to set us back,” Sirangelo noted. “In some interesting way, it might actually accelerate it.

NASA’s commercial crew initiative aims at restoring America’s manned spaceflight access to low Earth orbit and the International Space Station (ISS) – perhaps by 2017 – following the forced shutdown of the Space Shuttle program in 2011.

Until an American commercial space taxi is ready for liftoff, NASA is completely dependent on the Russian Soyuz capsule for astronaut rides to the ISS at a cost of roughly $70 million per seat.

Because Congress continues to significantly cut NASA’s budget further delays can be expected – inevitably meaning more payments to Russia and no savings for the American tax payer.

SNC was awarded $227.5 million in the current round of NASA funding and must successfully complete specified milestones, including up to five ALT drop tests to check the aerodynamic handling in order to receive payment.

This particular vehicle had been intended to fly two test flights. Further drop tests were planned with a new test vehicle to be constructed.

The way forward is being evaluated.

“We don’t think there is going to be any significant delay to the program as a result of this. This was meant to be a test vehicle with a limited number of flights,” Sirangelo said.

SNC and NASA have assembled a team to investigate the cause of the anomaly.

“SNC cannot release any further video at this time,” said SNC.

Dream Chaser is a reusable mini shuttle that launches from the Florida Space Coast atop a United Launch Alliance Atlas V rocket and lands on the shuttle landing facility (SLF) runway at the Kennedy Space Center, like the space shuttle.

Ken Kremer

October 29, 2013December 23, 2015 by Nancy Atkinson

Astrophoto: Too Many Stars to Count

A night sky over the Isle of Wight that is bright with the Milky Way and green airglow. Credit and copyright: Chad Powell.

Here’s a beautiful view of the Milky Way arching through the sky over the Isle of Wight, an island just off the south coast of England, known for having limited light pollution. This gorgeous image was taken by photographer Chad Powell. You can see more of Chad’s work on his website or his Facebook page.

Want to get your astrophoto featured on Universe Today? Join our Flickr group or send us your images by email (this means you’re giving us permission to post them). Please explain what’s in the picture, when you took it, the equipment you used, etc.

October 29, 2013December 23, 2015 by Elizabeth Howell

Fluorescent and Starry: New Zinger Space Images From Chandra’s X-Ray Archives

Composite image of NGC 6946, a spiral galaxy 22 million light years from Earth. At least eight supernova have exploded in this galaxy in the past century, including three spotted by Chandra (purple). Optical data is also visible in red, yellow and cyan from the Gemini Observatory. Credit: X-ray: NASA/CXC/MSSL/R.Soria et al, Optical: AURA/Gemini OBs

You know that moment when you’re flipping through old digital pictures (on your computer or phone or whatever) and you realize there are some pretty awesome ones in there that you should share on social media? The Chandra X-Ray Observatory team also decided to plumb THEIR archive of astrophysical image magic, and came up with several beauties. Such as the one above this text.

Chandra has been in space since July 23, 1999 — yes, that’s well over 14 years ago — and is considered one of NASA’s telescopes under the “Great Observatories” programs. The other telescopes, by the way, are the Hubble Space Telescope, the Compton Gamma-Ray Observatory and the Spitzer Space Telescope. Hubble and Spitzer are also still active today.

Check out more from the new set of images below. There are eight all told, representing a tiny fraction of the unprocessed thousands of images available to the public in the Chandra Source Catalog.

The Elephant Trunk Nebula (IC 1396A) in X-ray, optical and infrared light. Astronomers believe they are seeing winds from large, young stars hitting cooler gas around it, possibly triggering new starbirth. X-ray data from Chandra is in purple, with optical data (red, green and blue) and infrared (orange and cyan). Credit: X-ray: NASA/CXC/PSU/Getman et al, Optical: DSS, Infrared: NASA/JPL-Caltech

3C353 looks a bit like a tadpole. In the center of this image is a galaxy powered by a supermassive black hole, which is transmitting energy across the expanse. Radiation is visible in X-rays from Chandra (purple) and radio from the Very Large Array (orange.) Credit: X-ray: NASA/CXC/Tokyo Institute of Technology/J.Kataoka et al, Radio: NRAO/VLA

SNR B0049-73.6 in X-ray and infrared light. Chandra's observations (purple) revealed that the explosion seen here was likely from a star's central core collapse. Infrared data from the 2MASS survey is also visible in red, green and blue. Credit: X-ray: NASA/CXC/Drew Univ/S.Hendrick et al, Infrared: 2MASS/UMass/IPAC-Caltech/NASA/NSF — SNR B0049-73.6 in X-ray and infrared light. Chandra’s observations (purple) revealed that the explosion seen here was likely from a star’s central core collapse. Infrared data from the 2MASS survey is also visible in red, green and blue. Credit: X-ray: NASA/CXC/Drew Univ/S.Hendrick et al, Infrared: 2MASS/UMass/IPAC-Caltech/NASA/NSF

NGC 4945, a galaxy 13 million light years from Earth. This galaxy is similar to the Milky Way, but has a more active supermassive black hole in the center (visible in white). Chandra X-ray data is in blue, overlaid on European Space Observatory optical information. Credit: X-ray: NASA/CXC/Univ degli Studi Roma Tre/A.Marinucci et al, Optical: ESO/VLT & NASA/STScI

3C 397, sometimes called G41.1-0.3, is a supernova leftover that looks a little funny. It's possible that the shape comes from heated remains of the star's shell bump into cooler gas surrounding it. X-ray data from Chandra is purple, infrared data from the Spitzer Space Telescope is yellow, and optical data from the Digitized Sky Survey is in red, green and blue. Credit: X-ray: NASA/CXC/Univ of Manitoba/S.Safi-Harb et al, Optical: DSS, Infrared: NASA/JPL-Caltech — 3C 397, sometimes called G41.1-0.3, is a supernova leftover that looks a little funny. It’s possible that the shape comes from heated remains of the star’s shell bump into cooler gas surrounding it. X-ray data from Chandra is purple, infrared data from the Spitzer Space Telescope is yellow, and optical data from the Digitized Sky Survey is in red, green and blue. Credit: X-ray: NASA/CXC/Univ of Manitoba/S.Safi-Harb et al, Optical: DSS, Infrared: NASA/JPL-Caltech

NGC 3576, a nebula 9,000 light-years from Earth, in X-ray (blue) and optical data. Chandra spotted evidence of strong winds coming from young stars in the nebula. Optical data from the European Space Observatory is shown in orange and yellow. Credit: X-ray: NASA/CXC/Penn State/L.Townsley et al, Optical: ESO/2.2m telescope

G266.2-1.2 in X-ray (purple) and optical light. Chandra spotted high-energy particles shooting out from this supernova leftover. The optical data comes from the Digitized Sky Survey and is available in red, green, and blue. Credit: X-ray: NASA/CXC/Morehead State Univ/T.Pannuti et al, Optical: DSS

October 29, 2013December 23, 2015 by Elizabeth Howell

Samples From Mars Could Hitch A Ride To Earth In This Box

A European Space Agency-designed container that could be used one day to bring Martian samples back to Earth. Credit: ESA-Anneke Le Floc'h

Could this be as surprising as Forrest Gump’s box of chocolates? What you’re looking at here is a container that could one day contain samples of Mars. Yup, even though a “sample return” mission is still years away, the European Space Agency is already designing a container so that when the time comes, they’ll be ready for the trip.

This 11-pound (five kilogram) container absolutely needs to keep whatever is inside protected and at a constant temperature of 14 Fahrenheit (-10 Celsius) as it journeys from the Martian surface to Earth, which takes several months at the least. And the journey won’t be an easy one, ESA says:

“First, the sample container must be landed on Mars, along with a rover to retrieve a cache of samples carefully selected by a previous mission, according to current mission scenarios,” the agency stated.

A Mars sample return mission is still quite a ways away. Credit: European Space Agency

“Then, once filled, it will be launched back up to Mars orbit. There it will remain for several days until a rendezvous spacecraft captures it … Before being returned to Earth, the container will be enclosed in another larger bio-sealed vessel to ensure perfect containment of any returned martian material. This container will then be returned to Earth for a high-speed entry.”

Why not use a parachute? Well, if the samples contain life it would be awkward if the parachute malfunctioned and the capsule scattered stuff all over Earth. That’s why it’s designed for a crash landing; it can in fact withstand forces of at least 400 times the force of gravity, tests of the capsule have revealed.

The prime contractor for this project was French company Mecano I&D. ESA emphasizes this is just a proof of concept so far, and that further refinements are expected. Plus, this little machine needs a ride to and from Mars. When do you think that will happen, and how?

Source: European Space Agency

October 29, 2013April 26, 2016 by Elizabeth Howell

‘Shockwave Of Fire’ Rained Down After Old Comet Strike On Earth, Scientists Say

Artist's conception of a comet exploding in the Earth’s atmosphere above Egypt. Credit: Terry Bakker

Speak about destruction. A comet slammed into Earth’s atmosphere 28 million years ago and basically killed everything with fire below, leaving a huge deposit of yellow silica glass in its wake, a team of astronomers say.

The evidence — a black pebble found by an Egyptian geologist within this vast tract of glass — is believed to be a part of the comet’s nucleus or heart and not just an ordinary meteorite. The team says this could be the first hard evidence, so to speak, of a comet striking Earth.

The temporary “shockwave of fire” hit 2,300 square miles (roughly 6,000 square kilometers) of Egyptian sand, turning the grains into glass. Given the area’s rich archaeological history, it’s probably not too much of a surprise that a small portion of this is visible in a brooch that belonged to ancient boy-king Tutankhamun.

A brooch that belonged to the Egyptian boy-king Tutankhamun, which reportedly contains a silica glass stone that originated from a comet explosion. Credit: University of the Witwatersrand, Johannesburg

“It’s a typical scientific euphoria when you eliminate all other options and come to the realization of what it must be,” said lead author Jan Kramers of the University of Johannesburg in a statement.

Besides silica, the cosmic blast furnace left teeny-tiny diamonds in its wake, forming from carbon. “Normally they form deep in the earth, where the pressure is high, but you can also generate very high pressure with shock. Part of the comet impacted and the shock of the impact produced the diamonds,” said Kramers.

More information on this find should be available soon when the discovery is published in Earth and Planetary Science Letters. The authors first discussed their find in a public lecture Oct. 10. It will be interesting to see what other scientific teams think of this hypothesis, so stay tuned for the reaction.

Source: University of the Witwartersrand, Johannesburg

October 29, 2013December 23, 2015 by Ken Kremer

MAVEN and MOM Missions from NASA and India Plan Martian Science Collaboration in Orbit

MAVEN is NASA’s next Mars orbiter and is due to blastoff on Nov. 18 from Cape Canaveral, Florida. It will study the evolution of the Red Planet’s atmosphere and climate. Universe Today visited MAVEN inside the clean room at the Kennedy Space Center. With solar panels unfurled, this is exactly how MAVEN looks when flying through space and circling Mars. Credit: Ken Kremer/kenkremer.com

After years of hard work by dedicated science and engineering teams, a new pair of Mars orbiter science missions from Earth are in the final stages of prelaunch processing and are nearly set to blast off for the Red Planet in November.

If all goes well, NASA’s MAVEN orbiter and India’s MOM (Mars Orbiter Mission) will “work together” to help solve the mysteries of Mars atmosphere, the chief MAVEN scientist told Universe Today at a NASA briefing today (Oct. 28).

“We plan to collaborate on some overlapping objectives,” Bruce Jakosky told me. Jakosky is MAVEN’s principal Investigator from the University of Colorado at Boulder.

MAVEN and MOM will join Earth’s armada of five operational orbiters and surface rovers currently exploring the Red Planet.

India’s Mars Orbiter Mission (MOM) Spacecraft attached to the 4th stage of PSLV-C25 and ready for heat shield closure. It is slated to launch on Nov. 5, 2013. Credit: ISRO

MOM is India’s first mission to Mars. Its also first in line to this year’s Martian on ramp and is slated to lift off in barely one week on Nov. 5 atop the most powerful version of the Polar Satellite Launch Vehicle (PSLV) rocket from a seaside launch pad in Srihanikota, India.

The 1,350 kilogram (2,980 pound) MOM orbiter, also known as ‘Mangalyaan’, is the brainchild of ISRO, the Indian Space Research Organization.

NASA’s Mars Atmosphere and Volatile EvolutioN Mission (MAVEN) spacecraft launches in three weeks on Nov. 18 atop a United Launch Alliance Atlas V 401 rocket from a seaside pad on Cape Canaveral Air Force Station, Florida.

Both MAVEN and MOM will study the Red Planets atmosphere. Although they are independent and carrying different science payloads the two missions do have some common goals.

“There are some overlapping objectives between MAVEN and MOM,” Jakosky said.

“We have had some discussions with the MOM science team.”

Magnetometer science instrument boom juts out from MAVEN solar panel during launch processing inside the clean room at the Kennedy Space Center. Credit: Ken Kremer/kenkremer.com

Both orbiters are due to arrive at Mars in September 2014 after 10 month interplanetary cruises and will enter different elliptical orbits after main engine braking burns.

MAVEN is the first spacecraft from Earth devoted to investigating and understanding the upper atmosphere of Mars.

The purpose is to study specific processes and determine how and why Mars lost virtually all of its atmosphere billions of years ago and what effect that had on the history of climate change and habitability.

“The major questions about the history of Mars center on the history of its climate and atmosphere and how that’s influenced the surface, geology and the possibility for life,” said Jakosky.

“MAVEN will focus on understanding the history of the atmosphere, how the climate has changed through time, and how that influenced the evolution of the surface and the potential for habitability by microbes on Mars.”

“We don’t know the driver of the change.”

“Where did the water go and where did the carbon dioxide go from the early atmosphere? What were the mechanisms?”

“That’s what driving our exploration of Mars with MAVEN,” said Jakosky.

One of the significant differences between MOM and MAVEN regards methane detection – which is a potential marker for Martian life. Some 90% of Earth’s atmospheric methane derives from living organisms.

MOM has a methane sensor but not MAVEN.

“We just had to leave that one off to stay focused and to stay within the available resources ,” Jakosky told me.

MAVEN carries nine sensors in three instrument suites.

The Particles and Fields Package, provided by the University of California at Berkeley with support from CU/LASP and NASA’s Goddard Space Flight Center in Greenbelt, Md., contains six instruments to characterize the solar wind and the ionosphere of Mars. The Remote Sensing Package, built by CU/LASP, will determine global characteristics of the upper atmosphere and ionosphere. The Neutral Gas and Ion Mass Spectrometer, built by Goddard, will measure the composition of Mars’ upper atmosphere.

MOM’s science complement comprises the tri color Mars Color Camera to image the planet and its two moons, Phobos and Deimos; the Lyman Alpha Photometer to measure the abundance of hydrogen and deuterium and understand the planets water loss process; a Thermal Imaging Spectrometer to map surface composition and mineralogy, the MENCA mass spectrometer to analyze atmospheric composition, and the Methane Sensor for Mars to measure traces of potential atmospheric methane down to the ppm level.

Graphic outlines India’s first ever probe to explore the Red Planet known as the Mars Orbiter Mission (MOM). Launch is set for Nov. 5 from the Satish Dhawan Space Centre SHAR, Srihairkota, India. Credit: ISRO

“At the point where we [MAVEN and MOM] are both in orbit collecting data we do plan to collaborate and work together with the data jointly,” Jakosky told me.

“We agreed on the value of collaboration and will hold real discussions at a later time,” he noted.

NASA is providing key communications and navigation support to ISRO and MOM through the agency’s trio of huge tracking antennas in the Deep Space Network (DSN).

Over the course of its one-Earth-year primary mission, MAVEN will observe all of Mars’ latitudes at altitudes ranging from 93 miles to more than 3,800 miles.

MAVEN will execute five deep dip maneuvers during the first year, descending to an altitude of 78 miles. This marks the lower boundary of the planet’s upper atmosphere.

MAVEN has sufficient fuel reserves on board to continue observations for more than a decade.

The spacecraft will function as an indispensible orbital relay by transmitting surface science data through the “Electra” from NASA’s ongoing Curiosity and Opportunity rovers as well as the planned 2020 rover.

Stay tuned here for continuing MAVEN and MOM news and my launch reports from on site at the Kennedy Space Center press center.

Ken Kremer

…………….

Learn more about MAVEN, Mars rovers, Orion and more at Ken’s upcoming presentations

Nov 15-19: “MAVEN Mars Launch and Curiosity Explores Mars, Orion and NASA’s Future”, Kennedy Space Center Quality Inn, Titusville, FL, 8 PM

NASA’s MAVEN Mars orbiter, chief scientist Prof. Bruce Jakosky of CU-Boulder and Ken Kremer of Universe Today inside the clean room at the Kennedy Space Center on Sept. 27, 2013. MAVEN launches to Mars on Nov. 18, 2013 from Florida. Credit: Ken Kremer/kenkremer.com

October 28, 2013December 23, 2015 by Nancy Atkinson

Weekend Comet Bonanza!

Color image of Comet ISON on October 27, 2013. Credit and copyright: Damian Peach.

Astrophotographers were out in full force this weekend to try and capture the bonanza of comets now visible in the early morning skies! You’ll need a good-sized telescope to see these comets for yourself, however, but with the Moon now waning means darker skies and better observing conditions. Above is an absolutely gorgeous image of Comet ISON taken by Damian Peach. See below for more images of not only Comet ISON, but also Comet Encke, Comet Lovejoy and Comet LINEAR — now in outburst.

In fact, one of our “regular” contributors, John Chumack, captured all four comets in one morning, on Saturday October 26!

Four comets captured in one morning! Clockwise from top left: Comet ISON 2012 S1; Lovejoy C/2103 R1;, 2P ENCKE, Linear 2012 X1. Credit and copyright: John Chumack/Galactic Images.

Here’s what John said about his Comet ISON image: “The tail extends off the frame it is at least 20 arc minutes long now and the coma is still around 3-4 arc minutes in diameter. The comet is looking good at about 12th magnitude and continues to slowly brighten, just 30 more days to perihelion — closest point to the Sun. Hopefully it puts on a good show for all of December too!”

And Comet Linear 2012 X1 was at 14th magnitude, but now in outburst, John said, “it is over 100-fold brighter at 8th magnitude and expanding! It was low on the horizon at dawn, and tough to get. It just cleared the trees at 7:07am in bright dawn light! I managed a couple of quick shots before my CCD was flooded completely with light!”

Of Comet Lovejoy, John said, “I found it has developed a faint long tail…it is at least 12 arc minutes in length and the comet’s coma is now around 6 arc minutes in diameter. I already notified Terry Lovejoy in Australia and he was excited to hear his comet has developed a new tail!”

Here’s a timelapse video from John of Comet Lovejoy moving through the constellation of Canus Minor:

Here’s a view from a smaller telescope from Tom Wildoner, to give a better idea of what “most of us” would see with our humbler telescopes!

The view of Mars and Comet ISON on the morning of October 28, 2013. taken using a 75mm lens, 30 seconds at ISO 800. Look for the small blur inside the yellow circle. Credit and copyright: Tom Wildoner.

Comet 2012 1X (LINEAR) on October 28, 2013 following its recent outburst. Obtained under bright twilight, low altitude and moonlight! Credit and copyright: Damian Peach.

Comet ISON Nucleus on October 26, 2013 at 9:43 - 10:27 U.T. Taken with QHY8 CCD & Homemade 16" Newtonian telescope. A total of 40 minutes of exposure (20 x 120 second exposures). Credit and copyright: John Chumack/Galactic Images. — Comet ISON Nucleus on October 26, 2013 at 9:43 – 10:27 U.T. Taken with QHY8 CCD & Homemade 16″ Newtonian telescope. A total of 40 minutes of exposure (20 x 120 second exposures). Credit and copyright: John Chumack/Galactic Images.

Even NASA astronomers were out trying to take images of these comets. Here’s an image taken from NASA’s Marshall Spaceflight Center:

Comet ISON on October 25, 2013, taken with a 14 inch telescope at NASA's Marshall Space Flight Center in Huntsville, Alabama. Credit: NASA/MSFC/Aaron Kingery — Comet ISON on October 25, 2013, taken with a 14 inch telescope at NASA’s Marshall Space Flight Center in Huntsville, Alabama. Credit: NASA/MSFC/Aaron Kingery

NASA explains the image:

In the early morning of Oct. 25 (6:45 a.m. EDT), NASA’s Marshall Space Flight Center in Huntsville, Ala., used a 14″ telescope to capture this image of Comet C/2012 S1 (ISON), which is brightening as it approaches the sun. The comet shines with a faint green color just to the left of center. The diagonal streak right of center was caused by the Italian SkyMed-2 satellite passing though the field of view. At magnitude 8.5, the comet is still too faint for the unaided eye or small binoculars, but it’s an easy target in a small telescope.

At this time of this image, ISON was located in the constellation of Leo the Lion, some 132 million miles from Earth and heading in toward the sun at 87,900 miles per hour.

If you want to try and see some of these comets for yourself, see our recent “explainers” of how to see Comet 2012 1X LINEAR, Comet 2P (Encke), Comet 2011 W3 (Lovejoy), and the big one, Comet ISON.

Want to get your astrophoto featured on Universe Today? Join our Flickr group or send us your images by email (this means you’re giving us permission to post them). Please explain what’s in the picture, when you took it, the equipment you used, etc.

October 28, 2013April 26, 2016 by David Dickinson

Rare ‘Hybrid’ Solar Eclipse on November 3, 2013: How to See It

A partially eclipsed setting Sun as seen from Dallas, Texas on May 20th, 2012. This weekend's eclipse will offer U.S. East Coast residents a similar sunrise view. (Credit: Jason Major/Lights in the Dark).

It’s almost upon us. The final eclipse of 2013 occurs this coming weekend on Sunday, November 3^rd. This will be the fifth eclipse overall, and the second solar eclipse of 2013. This will also be the only eclipse this year that features a glimpse of totality.

This eclipse is of the rare hybrid variety— that is, it will be an annular eclipse along the very first 15 seconds of its track before transitioning to a total as the Moon’s shadow sweeps just close enough to the Earth to cover the disk of the Sun along the remainder of its track.

An animation of the path of the November 3rd hybrid solar eclipse. (Credit: NASA/Goddard Space Flight Center).

How rare are hybrid solar eclipse? Of the 11,898 solar eclipses listed over a 5,000 year span from 1999 BC to 3000 AD in Fred Espenak’s Five Millennium Catalog of Solar Eclipses, only 569, or 4.8% are hybrids.

Who can see this eclipse?

People from northern South America, across the U.S. Eastern Seaboard and up through the Canadian Maritimes will see a brief partial solar eclipse finishing up around 30 minutes after local sunrise. The brief annular “ring of fire” portion of the eclipse begins at sunrise just ~1,000 kilometres east of Jacksonville, Florida, as it races eastward across the Atlantic. See our timeline, below.

Eclipse prospects for the US East Coast. (Courtesy of Michael Zeiler @EclipseMaps)

Nearly all of Africa and the southern Mediterranean region including Spain will see partial phases of the eclipse, while greatest totality occurs just off of the coast of Liberia and heads for first landfall on the African continent over Wonga Wongue Reserve in Gabon. At this point, the duration of totality will already have shrunk back down to 1 minute and 7 seconds. The shadow of the Moon will then cross central Africa, headed for a short but brilliant sunset total eclipse over Uganda, Ethiopia, Kenya and Somalia.

The global path of this weekends eclipse-click to enlarge. (Credit: Michael Zeiler, @EclipseMaps).

This particular eclipse part of saros series 143 and is member 23 of the 72 eclipses in the cycle. The first eclipse in this saros occurred on March 7^th, 1617, and the last one will occur on April 23^rd, 2897.

Saros 143 also has a checkered place in eclipse history. The last eclipse in this series crossed south eastern Asia on October 24^th, 1995.

The first detailed picture of a solar eclipse was also taken of a saros 143 member on July 28, 1851. And one saros later, a total solar eclipse on August 7^th, 1869 may have saved the butt of astronomer and explorer George Davidson while traversing the wilds of Alaska. And one more saros period later, Dmitri Mendeleev (he of the modern periodic table) observed the total solar eclipse of August 19^th, 1887 from a balloon.

A daguerreotype image of the 1851 eclipse captured by Berkowski of the Royal Observatory in Königsberg, Prussia. (Public domain image).

We’ve compiled a brief worldwide timeline for the November 3^rd hybrid eclipse. Keep in mind, the shift back off of Daylight Saving Time occurs on the same morning as the eclipse for North America, putting the U.S. East Coast once again back to -5 hours off of Universal Time (UT):

10:04 UT: The partial phases of the eclipse begin.

11:05:17 UT: annular phases of the eclipse begin.

11:05:36 UT: The eclipse transitions from an annular to a total along its track.

12:46: The point of greatest eclipse, occurring off of the SW coast of Liberia along the coast of Africa. The path will be 57 kilometres wide at this point with a maximum duration for totality at 1 minute & 40 seconds.

14:27 UT: The total phases of the eclipse end.

15:28 UT: Partial phases end.

Remember that solar safety is paramount while observing an eclipse during all partial phases. This is especially critical, as millions of viewers along the U.S. East Coast are poised to catch the eclipse at sunrise over the Atlantic on Sunday. Use only glasses designed specifically for eclipse viewing or welder’s glass #14. One project headed by Astronomers Without Borders is also working to provide eclipse glasses to schools in Africa.

Students in Tanzania demonstrating proper eclipse viewing safety. (Credit: Astronomers Without Borders).

Projecting the Sun onto a wall or a piece of paper is also a safe method to observe the eclipse. Construction of a Sun Gun, a pinhole projector, or even using a spaghetti strainer or colander to project the partially eclipsed sun are all fun projects to try.

Shooting pictures of the rising eclipse is also possible using a DSLR. To capture the disk of the Sun plus an outline of the foreground, you’ll want to use a combination of low ISO 100 and a fast shutter speed (1/4000 or faster) and a zoom lens of at least 200mm or greater. Keep in mind, DO NOT look at the Sun through the camera’s view finder— simply set the focus to infinity and aim via projection. It’s worth practicing your technique a morning or two prior to the main event!

As the partial phase of the eclipse progresses, keep an eye out for “tiny crescents” that may litter the ground. These are caused by gaps in things such as leaves, latticework, etc that may act as natural “pinhole projectors”. Those lucky enough to stand in the path of totality may snare a look at shadow bands sweeping across the landscape as totality approaches, as well as catch a brief glimpse of Baily’s Beads and the pearly white corona of the Sun.

Totality will last less than a minute across most of central Africa, giving viewers a very hurried view before partial phases commence once more. Venus will be easily visible at magnitude -4.4 just 47 degrees east of the Sun. Unfortunately, prospects aren’t great for air or seaborne viewers in the mid-Atlantic to catch sight of comet ISON during the frenzied moments of totality, which will sit 50 degrees from the Sun between magnitude +7 & +8.

The sky over Gabon during mid-eclipse. (Created by the author using Starry Nite).

Weather prospects are an all-important consideration when planning for an eclipse. Jay Anderson maintains an outstanding site with projections tailor-made for each eclipse. For the U.S. East Coast, clear skies right down to the crucial eastern horizon will be key!

A recent surge in piracy off of the West Coast of Africa may also factor into travel considerations for eclipse chasers. You can actually monitor such activities on the high seas now in near real time. Perhaps one could take a page from Mark Twain’s A Connecticut Yankee in King Arthur’s Court, and impress any would-be-brigands with the glory of an impending solar eclipse…

Unfortunately, the International Space Station will have an orbit nearly perpendicular to the Earth-Moon-Sun syzygy, and won’t lend itself to any great prospects of a transit during the partial phases of the eclipse. ESA’s Proba-2 and JAXA’s Hinode will, however, see several partial eclipses from orbit:

Sunspot activity has also been on the upswing as of late, making for a photogenic Sun heading into the partial phases of the eclipse. A well-placed, naked eye Coronal Mass Ejection on the solar limb also isn’t out of the question. Eclipse historian and expert Michael Zeiler notes that a CME last occurred during a total solar eclipse way back in 1860.

Sunspot activity as of October 28th... will it stay active until this weekend's eclipse? (Photo by author). — Sunspot activity as of October 28th… will it stay active until this weekend’s eclipse? (Photo by author).

Totality for this eclipse passes over some wild and largely wifi free areas; few plans to broadcast the eclipse live have surfaced thus far.

Slooh plans a broadcast, as did a proposed Indiegogo project whose current status is unclear. BRCK also plans to broadcast the eclipse live from the shores of Lake Turkana, Kenya. Got plans to webcast even the partial phases of the eclipse? Let us know!

And speaking of eclipse chasing, we plan on heading to the Florida Space Coast Sunday morning at o’dark thirty to nab the partial sunrise eclipse over the Atlantic.

And as always, the question posed immediately after totality is: when’s the next one? Well, the next annular eclipse graces Australia on April 29^th, 2014. The U.S. will also see a partial solar eclipse on October 23^rd next year… but totality will not touch the surface of our fair planet until a high Arctic eclipse on March 20^th, 2015.

Good luck, clear skies, and safe journeys to all who are chasing after this one near and far, and don’t forget to post those pics to Universe Today’s Flickr page!

-See more of Michael Zeiler’s work at Eclipse Maps.

-Simulations were created using Starry Night Education Software.

October 28, 2013December 28, 2015 by Fraser Cain

Astronomy Cast 319: The Zodiac

Although the Zodiac is best known for astrology nonsense, it has a purpose in astronomy too. The constellations of the Zodiac define the plane of the ecliptic: the region where the Sun, Moon and planets appear to travel through the sky. What are the constellations of the Zodiac, and how do astronomers use them as way points?

We record Astronomy Cast as a live Google+ Hangout on Air every Monday at 12:00 pm Pacific / 3:00 pm Eastern. You can watch here on Universe Today or from the Astronomy Cast Google+ page.