Universe Today

December 17, 2013December 23, 2015 by Ken Kremer

How to See Spectacular Prime Time Night Launch of Antares Commercial Rocket to ISS on Dec. 19

Antares Launch – Maximum Elevation Map
The Antares nighttime launch will be visible to millions of spectators across a wide area of the Eastern US -weather permitting. This map shows the maximum elevation (degrees above the horizon) that the Antares rocket will reach during the Dec 19, 2013 launch depending on your location along the US east coast. Credit: Orbital Sciences[/caption]

UPDATE: The launch of Cygnus has been delayed until no earlier than January 7, 2014 due to the coolant leak at the International Space Station and necessary spacewalks to fix the problem. You can read more about the issue here and here.

WALLOPS ISLAND, VA – Orbital Sciences Corp. is marching forward with plans for a spectacular night blastoff of the firms privately developed Antares rocket and Cygnus cargo spacecraft on Thursday, Dec. 19 from a seaside pad at Wallops Island, Virginia on a mission for NASA that’s bound for the International Space Station (ISS).

The nighttime Antares liftoff is currently scheduled for prime time – at 9:19 p.m. EST from Launch Pad 0A at the Mid-Atlantic Regional Spaceport (MARS) at NASA Wallops Island, Virginia. It should be easily visible to tens of millions of residents along a wide swath of the US East Coast spanning from South Carolina to southern Maine – weather permitting.

Here’s our guide on “How to See the Antares/Cygnus Dec. 19 Night Launch” – with your own eyes – complete with viewing maps and trajectory graphics from a variety of prime viewing locations; including Philadelphia, NYC, Baltimore and historic landmarks in Washington, DC.

Update: launch postponed to mid-January 2014 to allow NASA astronauts to conduct 3 EVA’s to swap out the ammonia pump module and restore full cooling capacity to the ISS

It will be visible to spectators inland as well, stretching possibly into portions of West Virginia and western Pennsylvania.

For example; Here’s the expected view from Rocky’s famous workout on the steps of the Philadelphia Art Museum.

The viewing maps are courtesy of Orbital Sciences, the private company that developed both the Antares rocket and Cygnus resupply vessel aimed at keeping the ISS fully stocked and operational for science research.

Up top is the map showing the maximum elevation the rocket will reach in the eastern United States.

The flight is designated the Orbital-1, or Orb-1 mission.

Orb-1 is the first of eight commercial cargo resupply missions to the ISS by Orbital according to its Commercial Resupply Services (CRS) contract with NASA.

Of course you can still view the launch live via the NASA TV webcast.

This marks the maiden night launch of the two stage Antares rocket following a pair of daytime test and demonstration launches earlier this year, in April and September.

It’s important to note that the Dec. 19 liftoff is still dependent on NASA engineers resolving the significant issue with the ammonia cooling system that popped up late last week when a critical flow control valve malfunctioned.

If the pump valve can’t be brought back online, two American astronauts may make two or three unscheduled spacewalks starting later this week.

So in the event spacewalks are required, Antares launch could still slip a few days to the end of the launch window around Dec. 21 or Dec. 22. Thereafter the launch would be postponed until January 2014.

Here’s your chance to witness a mighty rocket launch – from the comfort of your home and nearby locations along the east coast.

And its smack dab in the middle of the Christmas and holiday season resplendent with shining bright lights.

Weather outlook appears rather promising at this time – 95% favorable chance of lift off.

The rocket was rolled out to the Wallops launch pad this morning by Orbital’s technicians.

Cygnus is loaded with approximately 1465 kg (3,230 lbs.) of cargo for the ISS crew for NASA.

NASA Television coverage of the Antares launch will begin at 8:45 p.m. on Dec. 19 – www.nasa.gov/ntv

Stay tuned here for Ken’s Antares launch reports from NASA Wallops Flight Facility, VA.

Ken Kremer

December 17, 2013December 23, 2015 by Jason Major

Watch a Star Blast Out Waves of Light

Hubble image of variable star RS Puppis (NASA, ESA, and the Hubble Heritage Team)

6,500 light-years away in the southern constellation Puppis an enormous star pulses with light and energy, going through the first throes of its death spasms as it depletes its last reserves of hydrogen necessary to maintain a stable, steady radiance. This star, a Cepheid variable named RS Puppis, brightens and dims over a 40-day-long cycle, and newly-released observations with Hubble reveal not only the star but also the echoes of its bright surges as they reflect off the dusty nebula surrounding it.

The image above shows RS Puppis shining brilliantly at the center of its dusty cocoon. (Click the image for a super high-res version.) But wait, there’s more: a video has been made of the variable star’s outbursts as well, and it’s simply mesmerizing. Check it out below:

Assembled from observations made over the course of five weeks in 2010, the video shows RS Puppis pulsing with light, outbursts that are then reflected off the structure of its surrounding nebula. What look like expanding waves of gas are really “light echoes,” radiation striking the densest rings of reflective dust located at farther and farther distances from the star.

According to the NASA image description:

RS Puppis rhythmically brightens and dims over a six-week cycle. It is one of the most luminous in the class of so-called Cepheid variable stars. Its average intrinsic brightness is 15,000 times greater than our sun’s luminosity.

The nebula flickers in brightness as pulses of light from the Cepheid propagate outwards. Hubble took a series of photos of light flashes rippling across the nebula in a phenomenon known as a “light echo.” Even though light travels through space fast enough to span the gap between Earth and the moon in a little over a second, the nebula is so large that reflected light can actually be photographed traversing the nebula. (Source)

RS Puppis is ten times more massive than our Sun, and 200 times larger.

Cepheid variables are more than just fascinating cosmic objects. Their uncanny regularity in brightness allows astronomers to use them as standard candles for measuring distances within our galaxy as well as others — which is trickier than it sounds. Because of its predictable variation along with the echoing light from its surrounding nebula, the distance to RS Puppis (6,500 ly +/- 90) has been able to be calculated pretty accurately, making it an important calibration tool for other such stars. (Read more here.)

Source: ESA news release

Full image credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)-Hubble/Europe Collaboration. Acknowledgment: H. Bond (STScI and Penn State University)

P.S.: Cepheid variables don’t last forever, though — sometimes they stop.

December 17, 2013December 23, 2015 by Elizabeth Howell

Comet Tourism Flight Trades ISON For Lovejoy

Bright, brighter, brightest: these views of Comet ISON after its closest approach to the sun Nov. 28 show that a small part of the nucleus may have survived the comet's close encounter with the sun. Images from the Solar and Heliospheric Observatory. Credit: ESA/NASA/SOHO/GSFC

When Comet ISON entered its zombie stage a few weeks ago, the effects were not only felt in the astronomical community, but also on astronomy tourists as the comet faded from the view of amateurs.

German company “Eclipse-Reisen” (Eclipse Travel) had to make a last-minute change in plans for a Dec. 8 flight for some 75 tourists planning to observe ISON, which morphed into a travelling dust blob after skimming too close to the sun in late November. Fortunately, Comet Lovejoy is still a strong astronomical object, providing an alternate thing to watch.

“Most of the passengers weren’t disappointed. They were more excited to see something new. Only a few journalists cancelled the flight. All photographers and experts fully understood the situation,” a statement from Air Partner to Universe Today said. (The spokespeople were German-speaking, requiring a translation by another party.)

Negative image taken Nov. 14 of Lovejoy's nucleus and dust fan. Credit: Dr. P. Clay Sherrod — Negative image taken Nov. 14 of Lovejoy’s nucleus and dust fan. Credit: Dr. P. Clay Sherrod

“Comet Lovejoy is no less spectacular and still very exciting like ISON and they were pleased to see it, actually. Although Lovejoy is less bright than ISON, it is weaker by four size classes, its tail is smaller and pale and Lovejoy flies farther past the Earth and the Sun.”

The company had to ask for permission to alter its flight path, and inform the passengers of the last-minute change, all in a few days, but officials added that the flight went off without a hitch.

You can read more information about the company (in German) on its website. In 2014, it plans to run a flight to observe auroras over Iceland, among others.

December 17, 2013December 29, 2015 by Susie Murph

Carnival of Space #332

Carnival of Space. Image by Jason Major.

The tent is up! This week’s Carnival of Space is hosted by Pamela Hoffman at the Everyday Spacer blog.

Click here to read Carnival of Space #332.

And if you’re interested in looking back, here’s an archive to all the past Carnivals of Space. If you’ve got a space-related blog, you should really join the carnival. Just email an entry to [email protected], and the next host will link to it. It will help get awareness out there about your writing, help you meet others in the space community – and community is what blogging is all about. And if you really want to help out, sign up to be a host. Send an email to the above address.

December 17, 2013December 23, 2015 by Elizabeth Howell

How Scientists Confirmed The Mass Of An Invisible Exoplanet

Artist's conception of Kepler-88. Credit: Center for Astrophysics of the University of Porto

Planets are so very tiny next to stars outside of the solar system, making it really hard to spot exoplanets unless they transit across the face of their star (or if they are very, very big). Often, astronomers can only infer the existence of planets by their effect on the host star or other stars.

That’s especially true of the curious case of Kepler-88 c, which researchers using the Kepler space telescope said was a possible planet due to its effects on the orbit of Kepler-88 b, a planet that goes across the host of its host star. European astronomers just confirmed the Kepler data using the SOPHIE spectrograph at France’s Haute-Provence Observatory.

It’s the first time scientists have successfully used a technique to independently verify a planet’s mass based on what was found from the transit timing variation, or how a planet’s orbit varies from what is expected as it goes across the face of its sun. That means TTV can likely be used as a strong method on its own, advocates say.

Illustration of the Kepler spacecraft (NASA/Kepler mission/Wendy Stenzel)

SOPHIE’s technique relies on measuring star velocity, which also can reveal a planet’s mass by seeing its effect on the star.

“This independent confirmation is a very important contribution to the statistical analyzes of the Kepler multiple planet systems,” stated Magali Deleuil, an exoplanet researcher at Aix-Marseille University who participated in the research. “It helps to better understand the dynamical interactions and the formation of planetary systems.”

Actually, the two planets behave similarly to Earth and Mars in our own solar system in terms of orbits, according to work from a previous team (led by David Nesvorny of the Southwest Research Institute). They predicted the planets have a two-to-one resonance, which is approximately true of our own solar system since Mars takes about two Earth years to orbit the sun.

The new research was led by S.C.C. Barros at Aix-Marseille University in France. You can read the study in the Dec. 17 edition of Astronomy & Astrophysics, or in preprint version on Arxiv.

Source: Center for Astrophysics at the University of Porto

December 17, 2013December 23, 2015 by Shannon Hall

Lithopanspermia: How Earth May Have Seeded Life on Other Solar System Bodies

The theory of Lithopanspermia states that life can be shared between planets within a planetary system. Credit: NASA

With the recent discovery that Europa has geysers, and therefore definitive proof of a liquid ocean, there’s a lot of talk about the possibility of life in the outer solar system.

According to a new study, there is a high probably that life spread from Earth to other planets and moons during the period of the late heavy bombardment — an era about 4.1 billion to 3.8 billion years ago — when untold numbers of asteroids and comets pummeled the Earth. Rock fragments from the Earth would have been ejected after a large meteoroid impact, and may have carried the basic ingredients for life to other solar system bodies.

These findings, from Pennsylvania State University, strongly support lithopanspermia: the idea that basic life forms can be distributed throughout the solar system via rock fragments cast forth by meteoroid impacts.

Strong evidence for lithopanspermia is found within the rocks themselves. Of the over 53,000 meteorites found on Earth, 105 have been identified as Martian in origin. In other words an impact on Mars ejected rock fragments that then hit the Earth.

The researchers simulated a large number of rock fragments ejected from the Earth and Mars with random velocities. They then tracked each rock fragment in n-body simulations — models of how objects gravitationally interact with one another over time — in order to determine how the rock fragments move among the planets.

“We ran the simulations for 10 million years after the ejection, and then counted up how many rocks hit each planet,” said doctoral student Rachel Worth, lead author on the study.

Their simulations mainly showed a large number of rock fragments falling into the Sun or exiting the solar system entirely, but a small fraction hit planets. These estimations allowed them to calculate the likelihood that a rock fragment might hit a planet or a moon. They then projected this probability to 3.5 billion years, instead of 10 million years.

In general the number of impacts decreased with the distance away from the planet of origin. Over the course of 3.5 billion years, tens of thousands of rock fragments from the Earth and Mars could have been transferred to Jupiter and several thousand rock fragments could have reached Saturn.

“Fragments from the Earth can reach the moons of Jupiter and Saturn, and thus could potentially carry life there,” Worth told Universe Today.

The researchers looked at Jupiter’s Galilean satellites: Io, Europa, Ganymede and Callisto and Saturn’s largest moons: Titan and Enceladus. Over the course of 3.5 billion years, each of these moons received between one and 10 meteoroid impacts from the Earth and Mars.

It’s statistically possible that life was carried from the Earth or Mars to one of the moons of Jupiter or Saturn. During the period of late bombardment the solar system was much warmer and the now icy moons of Saturn and Jupiter didn’t have those protective shells to prevent meteorites from reaching their liquid interiors. Even if they did have a thin layer of ice, there’s a large chance that a meteorite would fall though, depositing life in the ocean beneath.

In the case of Europa, six rock fragments from the Earth would have hit it over the last 3.5 billion years.

It has previously been thought that finding life in Europa’s oceans would be proof of an independent origin of life. “But our results suggest we can’t assume that,” Worth said. “We would need to test any life found and try to figure out whether it descended from Earth life, or is something really new.”

The paper has been accepted for publication in the journal Astrobiology and is available for download here.

December 16, 2013December 23, 2015 by Nancy Atkinson

Astrophotos: Geminid Meteor Shower Images from Around the World

One of the 27 antennas of the Very Large Array (VLA) radio telescope complex illuminated by moonlight, on December 13, 2013, peak night for the Geminid meteor shower. A single Geminid is right of the antenna at centre frame. Credit and copyright: Alan Dyer/Amazing Sky Photography.

It’s always one of the most reliable of the annual meteor showers, however, this year the Geminids had to compete with a bright waxing gibbous Moon, which reached Full Moon status today, just 3 days after the shower’s peak over the weekend. But as always, our astrophotographer friends were out in force to try and capture a meteor or two with their cameras. Take a look at our great gallery of shots from around the world, and thanks to everyone who submitted their images to Universe Today’s Flickr page!

A Geminid meteor and Comet C/2013 R1 Lovejoy, seen Dec. 11, 2013. Credit and copyright: Jeffrey Sullivan.

A Geminid meteor pierces the sky over the San Pedro volcano in the Atacama desert in Chile. Credit and copyright: srta Andrea on Flickr.

A Geminid meteor on Dec. 14, 2013 over the Captain Cook Monument in North Yorkshire, UK. Credit and copyright: Peter Greig.

A Geminid meteor races away from Jupiter on Dec. 14, 2013. Credit and copyright: James Lennie.

A Geminid Meteor streaking by Betelgeuse in Orion, as seen from the UK on Dec. 14, 2013. Credit and copyright: Dave Walker.

A Geminid meteor on Dec. 13, 2013. Credit and copyright: Max Zoom on Flickr.

An early Geminid crosses pathes with Comet 2013 R1 Lovejoy. (Credit: Jason Hullinger). — An early Geminid crosses paths with Comet 2013 R1 Lovejoy. (Credit: Jason Hullinger).

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.

December 16, 2013December 23, 2015 by Elizabeth Howell

Spacewalk, Or Backup Valve? NASA Works The Space Station Cooling Problem

The International Space Station as seen by the departing STS-134 crew aboard space shuttle Endeavour in May 2011. Credit: NASA

While Expedition 38 astronauts Rick Mastracchio and Michael Hopkins get their spacesuits and the Quest airlock ready in case they need to do a spacewalk to fix a cooling problem on board the station, NASA engineers have come up with an alternate proposal that could allow an interim fix from the ground.

A faulty flow control valve inside an external pump caused one of the station’s two main cooling loops to shut down automatically on Wednesday when the loop became too cold. This forced NASA to power down noncritical systems and some experiments as they moved the most needed systems on to a single loop.

After playing with the balky valve for several days, controllers determined it can’t be worked normally. Yet there is another valve nearby that possibly can.

Just “upstream” of the control valve is an isolation valve that possibly can be manipulated to control the temperature, said Kenny Todd, the ISS mission operations integration manager. While the valve is usually either open or closed to do its work, it is possible that it could be positioned at positions in between to warm up the coolant.

NASA Television graphic of where spare cooling pumps are located on station as of Dec. 13, 2013. On that day, NASA was weighing whether spacewalks were necessary to deal with a cooling problem caused by a malfunctioning flow control valve inside of a pump. Credit: NASA TV

“Can we use it as a regulator, if you will, to restrict the flow coming from the radiator and by doing that, that would help to put the temperature in the loop a little warmer,” Todd said in an update broadcast on NASA Television today (Dec. 16) that you can watch in full below.

He added, “We’re taking a valve and using it for a different purpose than we’d originally intended.” This means that software must be adapted to control the valve from the ground, among other things. The hardware vendor (which Todd did not name) has said that theoretically this finer control would be possible.

It’s too early to say if this fix could work in the short term, let alone the long term, which is why Mastracchio and Hopkins are standing by ready to do a spacewalk if need be. NASA has experience with this kind of repair before, most notably in 2010 when astronauts aboard Expedition 24 performed three spacewalks to deal with a broken pump in the same cooling loop. There are three spare pumps aboard station that could swap out the crippled one.

NASA and Mastracchio have both said that the crew is doing fine. The largest scheduling changes are reportedly related to science experiments being suspended, as well as adding in some spacewalk preparation activities. Also, the Cygnus cargo spacecraft’s planned launch has been pushed back at least one day to Dec. 19; last week, NASA said the station’s cooling problem means it is violating certain “commit criteria” for the launch to move forward.

We’ll keep you updated as events warrant.

December 16, 2013December 28, 2015 by Fraser Cain

Astronomy Cast Ep. 326: Atmospheric Dust

When you consider the hazards of spaceflight, it’s hard to get worked up about dust bunnies. And yet, atmospheric dust is going to be one of the biggest problems astronauts will face when they reach the surface of other worlds. Where does this dust come from, and what does it tell us about the history of other worlds, and what can we do to mitigate the health risks?
Continue reading “Astronomy Cast Ep. 326: Atmospheric Dust”

December 16, 2013December 23, 2015 by Fraser Cain

Our Phases of the Moon App is Free Today – December 16, 2013

If you’re an iPhone/iPad user, you might be interested to know that we’re giving away our Phases of the Moon app away for free today. That’s a $1.99 app, totally free.

Click here, and install it.

Based on the amazing simulated lunar phases by NASA’s Goddard Spaceflight Center, this app allows you to spin through the phases of the Moon on your phone or tablet. You can pinch zoom to see a full lunar atlas, or pan the Moon. See what the phase of the Moon was on your birthday or some special event.

If you do install it, could you take a second and write a review? It would really help us out.

P.S. The Android edition has always been free, and honestly it’s better because of the sweet Live Wallpaper and Widget.