Space and astronomy news
Last week we talked about the Italian astronomer Giovanni Cassini. This week we’ll talk about the mission that shares his name: NASA’s Cassini Spacecraft. This amazing mission is orbiting Saturn right now, sending back thousands of high resolution images of the ringed planet and its moons.
Click here to download the episode.
Or subscribe to: astronomycast.com/podcast.xml with your podcatching software.
I’m venturing from my Canadian stronghold to the hotlanta for the next week to participate in DragonCon. I’m taking the whole family this time, and unleashing them on an unsuspecting crowd of sci-fi fans.
Here’s what I’m scheduled to be doing:
Uh… that’s it. For the rest of the time, I’ll be a rabid sci-fi fan, attending lots of cool stuff. But drop me an email at [email protected] if you want to hang out.
See you there… or not.
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Many planetary scientists suspect that Mars, now cold and very dry, once had a liquid water ocean covering parts of its surface. But this does not necessarily mean that the Red Planet was ever a tropical paradise… a recent paper by a team of astrobiologists suggests that Mars was much more bitter than balmy.
Astrobiologist Alberto Fairyn and colleagues have published a paper in the journal Nature Geoscience suggesting that the marked absence of phyllosilicates in Mars’ northern lowlands is indicative of a cold ocean environment, with perhaps even a boundary of frozen glaciers.
Phyllosilicates are minerals that, on Earth, are found readily in marine sediments and sedimentary rock that was formed in the presence of an ocean environment. These same minerals have also been seen via orbiting spacecraft spectrometers to be present in sediments located in Mars’ equatorial regions, but not in the northern latitudes. Fairyn and his team, intrigued by the disparity between existing models that described Mars as being once warm and wet and the lack of phyllosilicates in the north, used new climatic and geochemical models to deduce that Mars’ northern oceans must have been consistently near freezing, with portions even covered over by ice.
The current presence of moraines in the northern highlands also suggests that glaciers may have surrounded these frigid seas, which may have prevented the transportation of phyllosilicates down to the northern ocean basin. Again, to use our own planet as an analogy, moraines are rocky debris left over from the movement of glaciers. Their existence on Mars strongly suggests a period of early glaciation.
The research by Fairyn et al. contradict – or, more aptly, combine – two leading concepts of early Mars: one, that it was cold and dry and the existence of any liquid water was restricted to the equator for small periods of time; and two, that it was once globally warmer and wetter and sustained rivers, lakes and oceans of liquid water for extended periods.
Thus a cold Mars with an Arctic, icy ocean seems to be a more fitting causation of the current state of the planet, suggests Fairyn.
More research is planned, including running through more low-temperature models and hunting for ancient coastal areas that may have been impacted by icebergs. This will no doubt prove to be a challenge since much of the evidence is now buried deep beneath newer sediments and volcanic deposits. Still, Fairyn is confident that his model may help solve a long-standing debate over the history of the Red Planet.
Read more in an article by Bob Yirka on PhysOrg.
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Jason Major is a graphic designer, photo enthusiast and space blogger. Visit his website Lights in the Dark and follow him on Twitter @JPMajor or on Facebook for the most up-to-date astronomy awesomeness!
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NASA’s solar powered Jupiter bound Juno orbiter has captured her first image – a beautiful portrait of the Earth & Moon – since the probe blasted off from the home planet.
Juno lifted off 25 days ago at 12: 25 p.m. on August 5 from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida. The spacecraft snapped the portrait with the onboard JunoCam camera on August 26 after journeying some 6 million miles (9.66 million km) from Earth and while traveling at a velocity of 77,600 miles per hour (124,900 kilometers per hour) relative to the sun.
“The image of the Earth Moon system is a rather unique perspective that we can get only by stepping outside of our home planet,” said Scott Bolton, Juno principal investigator, in an exclusive interview with Universe Today. Bolton is from the Southwest Research Institute in San Antonio.
“On our way to Jupiter, we’ve looked back at home and managed to take this amazing image.”
“Earth looking much like any other planet or star from a distance is glorious as this somewhat average looking “star” is home to all of humanity. Our companion, the moon, so beautiful and important to us, stands out even less.”
“We appear almost average and inconspicuous, yet all of our history originates here. It makes one wonder just how many other planets or solar systems might contain life like ours,” Bolton told me.
The Juno team commanded the probe to take the image as part of the checkout phase of the vehicles instruments and subsystems.
“The JunoCam instrument turn on and check out were planned activities. The instrument is working great and in fact, all the instruments that we’ve turned on thus far have been working great,” Bolton added.
So far the spacecraft is in excellent health and the team has completed the checkout of the Waves instrument and its two Flux Gate Magnetometer sensors and deployment of its V-shaped electric dipole antenna.
“We have a couple more instruments still to do,” Bolton noted.
The team reports that Juno also performed its first precession, or reorientation maneuver, using its thrusters and that the first trajectory control maneuver (TCM-1) was cancelled as unnecessary because of the extremely accurate targeting provided by the Atlas V rocket.
The portrait shot is actually not Juno’s last photo of her home.
The 8000 pound (3,600 kilogram) probe will fly by Earth once more on October 9, 2013 for a gravity assisted speed boost of 16,330 MPH (7.3 km/sec) to accelerate Juno past the asteroid belt on its long journey to the Jovian system.
JunoCam will collect new photos and the other science instruments will make measurements as Juno cartwheels past Earth during the slingshot to Jupiter.
Juno is on a 5 year and 1.7 Billion mile (2.8 Billion km) trek to the largest planet in our solar system. When she arrives at Jupiter on July 4, 2016, Juno will become the first polar orbiting spacecraft at the gas giant.
During a one year science mission – entailing 33 orbits lasting 11 days each – the probe will plunge to within about 3000 miles (5000 km) of the turbulent cloud tops and collect unprecedented new data that will unveil the hidden inner secrets of Jupiter’s genesis and evolution.
The goal is to find out more about the planets origins, interior structure and atmosphere, observe the aurora, map the intense magnetic field and investigate the existence of a solid planetary core.
“This is a remarkable sight people get to see all too rarely,” said Bolton in a NASA statement about the Earth-Moon photo. “This view of our planet shows how Earth looks from the outside, illustrating a special perspective of our role and place in the universe. We see a humbling yet beautiful view of ourselves.”
NASA’s Jet Propulsion Laboratory manages the Juno mission. The spacecraft was designed and built by Lockheed Martin Space Systems, Denver.
Read my continuing features about Juno
Juno Blasts off on Science Trek to Discover Jupiter’s Genesis
Juno Jupiter Orbiter poised at Launch Pad for Aug. 5 Blastoff
JUNO Orbiter Mated to Mightiest Atlas rocket for Aug. 5 Blastoff to Jupiter
Solar Powered Jupiter bound JUNO lands at Kennedy Space Center
I love Kickstarter projects, and I love space. So here’s something that puts them both together: the Hubble Roadshow Kickstarter project. If they can raise $20,000, this group will tour the US in a custom RV showing the new documentary, Saving Hubble. They’ll organize telescopes, parties… even jugglers.
So if this sounds like a project worth backing, go ahead and kick them a few bucks. And then show up and celebrate Hubble when they pass through your town.
How will we work and set up a base camp on an asteroid? NASA is currently doing some field work to test technologies that could be used on future human missions to asteroids. The Desert Research And Technology Studies (D-R.A.T.S) crew is back in action, testing communication scenarios for near-Earth asteroids, and 2 new instruments from Goddard Spaceflight Center, the ExPED and VAPoR. The video shows more info.
The crew will be doing live webcasts the next few days. You can watch below, or at this link. Times of the webcast vary, so watch the side chat window for updates.
Continue reading “Human Mission to an Asteroid: Asteroid Field Testing”
NASA Video Caption: The Life of Hurricane Irene from the Caribbean to Canada from August 21 through August 29 seen by NASA/NOAA satellites. Credit: NASA/NOAA/GOES/MODIS
The new NASA animation above shows the birth and subsequent destructive and deadly path followed by Hurricane Irene from August 21 through August 29, 2011 starting in the Caribbean, and then tracking along the US East Cost and up into Canada. The observations combine images taken by NASA and NOAA Earth orbiting satellites.
The cloud images were captured by the NASA/NOAA GOES-13 satellite and overlaid on a true-color NASA MODIS map. Irene followed a lengthy course over Puerto Rico, Hispaniola, the Bahamas, and then along the entire US East with landfalls over North Carolina, New Jersey and New York.
NASA ISS astronaut Ron Garan and cameras flying overhead aboard the International Space Station (ISS) also photographed vivid images showing the magnitude of Irene slamming into the US East coast.
Irene caused widespread property damage. Massive and raging flooding in several US states destroyed houses, crushed businesses and washed away bridges and roads and more. The worst flooding is yet to come to some inland portions of Vermont, New Jersey, New York, Pennsylvania and elsewhere as uncontrollable waters continue to rise at numerous rivers, lakes and even ponds, threatening even more misery in their wake.
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So far 41 fatalities in 12 states have been attributed to Irene and more may be expected as searches continue. Some communities have been entirely cut off due to washed out access. Airlifts of food and water have begun. More people are being evacuated from New Jersey towns today, Aug 30.
Brave emergency rescue workers have put their own lives at peril and saved the lives of countless others of all ages from babies to the elderly. Some 8 million customers, including my area, lost power due to extensive flooding, downed trees and electrical wires, and devastated infrastructure.
Emergency crews are hard at work to restore power as quickly as possible, but many thousands of homes and businesses could be without power for up to a week or more. About 3.3 million customers are still without power today.
NASA’s GOES-13 satellite captured a dramatic view of Hurricane Irene just 28 minutes prior to making landfall over New York City. Today’s NASA Image of the day shows the humongous cloud cover spanning the US East coast from the Mid-Atlantic States up to New Jersey, New York, Pennsylvania, and New England and into Toronto, Canada.
Many transit systems and airports in Irene’s path were shutdown ahead of the storm.
Send me your photos of Irene’s destruction to post at Universe Today.
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Want to experience a “you-are-there” moment with the Opportunity rover on Mars? Grab a set of 3-D glasses (red/blue) and take a gander at one of the latest views from Oppy as she starts her explorations around the rim of Endeavour Crater. This stunning 3-D version of an image taken by the rover was created by our pal Stu Atkinson. This “rock garden,” as the folk from Unmanned Spaceflight are calling it, provides a view unlike anything either Mars rover has investigated yet on Mars. The region is called “Spirit Point” in honor of the now-silent rover that sits on the other side of Mars. This is actually an ejecta field of rocks thrown about after the impact that created this huge crater where the rover is now traversing, and is an exciting region for the MER scientists to explore. As Stu so poetically says in his Road to Endeavour blog, it’s also exciting because Opportunity “was sent to Mars to look at rocks, to drive between rocks, to trundle over powdery, cinnamon-hued dust that used to be rocks to get to younger, more solid rocks.”
Oppy’s found a veritable treasure trove of interesting rocks to explore, and Stu has also put together a collection of some of the most interesting in the rover’s current field of view:
The latest mission update for Opportunity on the Mars Rover website says the rover has now reached the rock named Tinsdale 2, started a multi-sol, multi-target in-situ (contact) investigation with a Microscopic Imager (MI) mosaic of a set of surface targets collectively named “Timmins,” followed by a placement of the Alpha Particle X-ray Spectrometer (APXS) for an overnight integration. So, she is putting all her resources to work to find out more about this interesting rock.
Here’s a non-3-D, raw image of the region from Opportunity:
Thanks to Stu for sharing his great images, and you can read more about this interesting spot on Mars in Stu’s article, “In Praise of Rock“
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The Russian news agency Itar-Tass is reporting that the cause of the August 24 failure and crash of the Progress re-supply ship that was supposed to bring supplies to the International Space Station may have already been determined. “Members of the emergency commission have determined the cause of the failure of the Soyuz carrier rocket’s third stage engine,” Roscosmos spokesman Alexei Kuznetsov was quoted. “It is a malfunction in the engine’s gas generator.”
If the cause has indeed been found and if the anomaly can be resolved to the satisfaction of both Roscosmos and NASA, it might prevent a worst-case scenario of having to de-crew the International Space Station by mid-November, which NASA Space Station Program Manager Mike Suffredini said was a potential outcome.
The emergency commission to study the problem was only formed on August 26, and that a cause has already been found comes as a bit of a surprise. The commission is lead by Anatoly Koroteev, head of the Russian Keldysh science research institute on rockets.
“He is a man with quite a bit of experience in this field for our Russian colleagues, and indeed the world,” Suffredini said during a press briefing on Monday morning. But Suffredini also said that it would likely take the commission awhile to sort out the cause and its implications to future flights.
“The team is just getting going,” Suffredini commented. “They are trying to work quickly to resolve the anomaly but they don’t want to leave any stone unturned.”
What actions will be taken to resolve the problem now that a cause may be established are not yet known. Suffredini said that two Soyuz-family unmanned rockets are scheduled to launch soon, which may provide a chance to test any fixes on unmanned launches before attempting a manned launch. A commercial Soyuz to launch a mobile communications satellites is scheduled on Oct. 8, and the Russians may launch the Progress resupply ship that is currently scheduled for October 26 a few weeks earlier in order to have another unmanned launch to study the problem.
The Progress cargo ships launch on a Soyuz-U rocket, while the Soyuz crew capsules, the Soyuz TMA launches on a Soyuz-FG. The third stages of the two rockets are virtually identical. The Soyuz-U rocket has had 745 successful launches and just 21 failures over nearly four decades. The Soyuz-FG has had 25 launches, all successful.
A brand new Carnival of Space is hosted by Brain Wang over at Next Big Future.
Click here to read Carnival of Space #212
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.