Japan’s first robotic mission to Venus and an experimental solar sail launched successfully from the Tanegashima Space Center in southern Japan. The Venus Climate Orbiter, or Akatsuki, the IKAROS solar sail and several smaller payloads launched aboard an H-IIA rocket at 6:58 local time May 21 (21:58 UTC May 20). The video shows a very smooth-looking launch, and 27 minutes later, JAXA confirmed the successful separation of Akatsuki. Then, about 15 minutes after that, the solar sail canister separated.
Continue reading “Japan’s Venus Orbiter and Solar Sail Missions Launch Successfully”
Satellite Images Show Oil Slick on the Move Towards Florida, Possibly East Coast of US
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Confirming some of the worst fears about the Deepwater Horizon oil spill in the Gulf of Mexico, satellite images now show part of the oil slick has entered the Loop Current, a powerful conveyor belt-like current that flows clockwise around the Gulf of Mexico towards Florida. The Loop Current joins the Gulf Stream — the northern hemisphere’s most important ocean-current system — and the oil could enter this system and be carried up to the US East Coast.
Both NASA and ESA satellites have been returning daily satellite images of the oil spill.
“With these images from space, we have visible proof that at least oil from the surface of the water has reached the current,” said Dr Bertrand Chapron of Ifremer, the French Research Institute for Exploitation of the Sea.
During the first weeks following the explosion at the oil rig, oil could be seen drifting from the site of the incident and it usually headed west and northwest to the Mississippi River Delta. But in the third week of May, currents drew some of the oil southeast. According to the National Oceanic and Atmospheric Administration (NOAA), the southward spread increased the chance that the oil would become mixed up with the Loop Current and spread to Florida or even the U.S. East Coast.
In this Envisat Advanced Synthetic Aperture Radar (ASAR) image, acquired on 18 May 2010, a long tendril of the oil spill (outlined in white) is visible extending down into the Loop Current (red arrow).
The infrared image is annotated with the location of the leaking well and the approximate location of the southern arm of the oil slick on May 17 (based on natural-color MODIS imagery). Oil was very close to the Loop Current, whose warm waters appear in yellow near the bottom of the image. However, there is also an eddy of cooler water (purple) circulating counterclockwise at the top of the Loop Current. According to NOAA, “Some amount of any oil drawn into the Loop Current would likely remain in the eddy, heading to the northeast, and some would enter the main Loop Current, where it might eventually head to the Florida Strait.”
This unusual natural color image taken on May 18, 2010 by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite shows sun glinting off the oil slick. The diagonal stripes result from the Sun’s reflection on the ocean surface, called sunglint. The sunglint accentuates the left-to-right scans that the satellite sensor makes as it passes over the Earth’s surface, and the stripes are perpendicular to the satellite’s path.
Besides hinting at the sensor’s scans, the sunglint also illuminates oil slicks on the sea surface. Bright oil slicks appear east and southeast of the delta.
NASA’s and ESA’s satellites will keep watch on this oil slick from above.
Sources: NASA Earth Observatory, (this page, and this page, too), ESA
Hubble Confirms Star is Devouring Hot Exoplanet
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We all like a hot meal, but this is really bizarre. Back in February, Jean wrote an article about WASP-12b, the hottest known planet in the Milky Way that is being ripped to shreds by its parent star. Shu-lin Li of the Department of Astronomy at the Peking University, Beijing, predicted that the star’s gravity would distort the planet’s surface and make the interior of the planet so hot that the atmosphere would expand out and co-mingle with the star. Shu-lin calculated the planet would one day be completely consumed. Now the Hubble Space Telescope has confirmed this prediction, and astronomers estimate the planet may only have another 10 million years left before it is completely devoured.
Using the Cosmic Origins Spectrograph (COS), and its sensitive ultraviolet instruments, astronomers saw that the star and the planet’s atmosphere share elements, passing them back and forth. “We see a huge cloud of material around the planet, which is escaping and will be captured by the star. We have identified chemical elements never before seen on planets outside our own solar system,” says team leader Carole Haswell of The Open University in Great Britain.
This effect of matter exchange between two stellar objects is commonly seen in close binary star systems, but this is the first time it has been seen so clearly for a planet.
The planet, called WASP-12b, is so close to its sunlike star that it completes an orbit in 1.1 days, and is heated to nearly 1,540 C (2,800 F) and stretched into a football shape by enormous tidal forces. The atmosphere has ballooned to nearly three times Jupiter’s radius and is spilling material onto the star. The planet is 40 percent more massive than Jupiter.
WASP-12 is a yellow dwarf star located approximately 600 light-years away in the winter constellation Auriga.
Haswell and her science team’s results were published in the May 10, 2010 issue of The Astrophysical Journal Letters.
Science Paper by: L Fossati et al.
Original article on Universe Today by Jean Tate
Original paper by Shu-Lin
Source: HubbleSite
Carnival of Space #154
This week’s Carnival of Space is hosted by Chris Dann over at Weird Warp.
Click here to read the Carnival of Space #154
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, let Fraser know if you can be a host, and he’ll schedule you into the calendar.
Finally, if you run a space-related blog, please post a link to the Carnival of Space. Help us get the word out.
Amazing Time-Lapse Video of Space Shuttle Discovery
UPDATE: Sorry, but the video includes an annoying loud commercial that starts up automatically every time the page loads on UT, but you should really watch this cool video here. Read about it below, though, first!
This is incredible! Smithsonian Air & Space photographers Scott Andrews, Stan Jirman and Philip Scott Andrews created a unique time-lapse video (at the request of shuttle commander Alan Poindexter) from from thousands of individual frames, and they condense six weeks of painstaking work into three minutes, 52 seconds (read here how they did it). The video quickly chronicles the processing of Discovery for the STS-131 mission, and starts at the Orbiter Processing Facility at NASA’s Kennedy Space Center, then goes on to the Vehicle Assembly Building, (the video of how the shuttle is hoisted into a vertical position and lowered onto its external fuel tank is absolutely amazing). Then it’s off to the pad for launch, and you even get to see a quick glimpse of Discovery as it lands. This is the shuttle and mission for which I was able to see much of the processing and pre-launch events, so I found it especially meaningful, but it is even more poignant since the end of the shuttle program is quickly approaching.
Citizen Science Goes to the Moon
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Have you ever wanted to explore the Moon? Well, now you can as a virtual astronaut, and you can help lunar scientists answer important questions, as well. New from the Zooniverse — from the same folks that brought you Galaxy Zoo — is Moon Zoo. “We’re asking citizen scientists to help answer different aspects of lunar science and outstanding questions that we still have,” said Dr. Katherine Joy from the Lunar and Planetary Institute and a Moon Zoo science team member.
Moon Zoo uses about 70,000 high resolution images gathered by the NASA’s newest lunar spacecraft. the Lunar Reconnaissance Orbiter. In these images are details as small as 50 centimeters (20 inches) across, and ‘Zooites’ are will be asked to catergorize craters, boulders and more, including lava channels and even all sorts of different spacecraft sitting on the Moon’s surface.
How fun is this latest Zoo project?
“Actually, I have to say after a few days of playing with it I find it much more addictive than the others,” said Chris Lintott, head “zookeeper” of the Zooniverse and chair of the Citizen Science Alliance. “Galaxy Zoo was bad enough but I’m obsessed with the Moon now. I can’t quite believe the variety of the places we’re seeing. People think the Moon is this boring place – they say, ‘we know what it looks like, it’s just grey and flat, right?’ But actually it has its own landscape that is really quite dramatic, especially when the sun is low, so it’s a world well worth exploring.”
Want to join in? Go to the Moon Zoo website, and if you’ve participated any of the previous Galaxy Zoo or Solar Storm Watch projects, you can use the same username and password. If not, it’s easy to sign up.
Under the “How to Take Part” tab you’ll find a tutorial that will teach you how to participate in Moon Zoo.
The two main biggest tasks right now are the Crater Survey, where you can mark all the craters (down to a certain size), and Boulder Wars, where you are shown two images and you determine which has the most boulders.
But Dr. Joy said there will soon be some additional tasks, created from a wish list from lunar scientists. “One of the main tasks we really want to do is to compare these new LRO images to older Apollo panoramic camera images that were taken 40 years ago,” she said. “And what we can do is match these older images against the new images with similar lighting conditions and similar angles at which the camera was pointed at the surface and what we might be able to do is to spot differences that have occurred between 40 years ago and now, which could be in the form of say, new impact craters that have formed from incoming bolides. We might be able to spot new debris flows and landslides that have happened in the past 40 years. This can provide us information about the really recent history of the Moon.”
Questions? There’s a FAQ section and a discussion forum where you can pose queries or discuss any issues or interesting finds with other Zooites.
“We’re hoping to reach out to people that have never really looked at the Moon before in any kind of detail and get them excited about all the secrets the Moon still has,” said Dr. Joy “because there are plenty of new things that people have never looked at before.”
Listen to the May 19, 2010 edition of the 365 Days of Astronomy podcast for an interview with Katie Joy and Chris Lintott.
Where In The Universe Challenge #105
Ready for another Where In The Universe Challenge? Here’s #105! Take a look and see if you can name where in the Universe this image is from. Give yourself extra points if you can name the spacecraft responsible for the image. We provide the image today, but won’t reveal the answer until tomorrow. This gives you a chance to mull over the image and provide your answer/guess in the comment section. Please, no links or extensive explanations of what you think this is — give everyone the chance to guess.
UPDATE: The answer has now been posted below.
On July 20, 1976 the Viking 1 Lander separated from the the Viking Orbiter and touched down at Chryse Planitia. This image was taken on the 28th sol or Martian day of the mission. As you may know, the Viking 1 lander has now been surpassed in having the record of longest surface mission on Mars — the Opportunity just passed Viking 1’s duration of six years and 116 days operating on the surface of Mars.
The imaging team from Viking were basically learning on the fly on how to calibrate the color for the images, so some early images tended to show “blue” sky, while later reconstructions, trying to account for out-of-band contributions in each filter, tended to show a “red” sky, and often an “orange” surface. Owing to calibration uncertainties, the exact reconstruction of Viking Lander color images remains more or less an art. But what a heady time that must have been in 1976, having two landers on Mars, both working successfully!
Learn more about the Viking lander images and mosaics here.
Check back next week for another WITU challenge!
More Up-Close Images of Eyjafjallajokull Volcano and Its Effect on Life in Iceland
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Astronomer Snaevarr Gudmundsson from Iceland, who shared his incredible close-up images of the Eyjafjallajokull volcano with Universe Today back in April, has made another trek out to visit the region near the volcano. “Under the ash clouds the world takes strange turn,” he wrote in an email. “It is hard for residents to live in the neighborhood under these circumstances. When wind turns the ash clouds over their home village it gets unbearable to stay outside. It is absolutely essential to keep mask and goggles on to prevent sore throat and eyes filled with fine grained ash. The fine grained ash fills up every pore and penetrates into houses through every weakness, like joints around doors and windows, even though it is very well sealed. As you see where the bus is near the grill house at Vik (see below) a bad ash storm was making otherwise normal life awful.”
See more of Gudmundsson’s images of the Iceland volcano and how it is affecting life in Iceland.
Gudmundsson said that some images show the grass is green and one might assume everything is ok. “But the vegetation is growing through the ash layer which is up to 15 cm thick,” he said. When looking down into it the green color fades into grey ash with the grass sticking through.”
These two photographs provide an idea of sediment disposal down into a the lagoon. “As I told you, it filled up the lagoon (believed to be 30 – 40 m deep before the eruption) in matter of two days by debris floods in the beginning of the eruption,” said Gudmundsson. “If you compare the two images from 2005 and now in May 2010 (not taken by same place) you can see how high the sediment plain reaches up to the glacier. Take note of the prominent gully and how high up it is . Indeed sediment has now buried the lower part of it so it will be curious to see what happens to the glacier in the future.”
Thanks once again to Snaevarr Gudmundsson for sharing his images and insight of the Eyjafjallajokull volcano and how it is affecting life in Iceland.
Listen to a podcast on 365 Days of Astronomy of Snaevarr Gudmundsson interviewed by Col Maybury from radio station 2NUR in Australia, talking about the volcano.
What is the Air Force’s Secret X-37B Space Plane Doing in Orbit?
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Last month’s launch of the US Air Force X-37B secret mini space plane has fueled speculation about the real mission of this vehicle and if it could possibly be used for a new type of military weapon. The X-37B launched on April 22, 2010 and has the ability to stay in orbit for up to 270 days. While the Air Force provided a webcast of the launch, since then there has been no word — leaked or official – about the status of the mission. “There has been a lot of speculation about what this vehicle could do and what sort of capabilities it could provide to the U.S. military, and some of that speculation was based on more science fiction than fact,” said Brian Weeden from the Secure World Foundation. “While a successful completion of the X-37B flight, landing, and turn-around will certainly be a significant step forward in reusable space vehicle technology, it is a long ways away from a single-stage-to-orbit capability.”
Weeden has put together a fact sheet on the X-37B, looking at the technical feasibility of some of the proposed missions for the mini space shuttle look-alike, and says that there’s almost no chance it could be used as a new weapon or a new weapon delivery system.
The X-37B will land unpiloted at Edwards Air Force Base in California. It uses solar arrays and lithium ion batteries to generate power instead of fuel cells like the space shuttle, a major reason why it can stay on orbit for much longer.
Weeden said that after looking at all the proposed missions for the X-37B, he concluded the most likely probability is that it will be used as a flexible, responsive spacecraft to collect intelligence from space and as a platform to flight test new sensors and satellite hardware.
“One of the downsides to using satellites for collecting intelligence is that once they are launched they have a fixed set of sensors and capabilities,” Weeden said. “The X-37B brings to space the capability to customize the on-board sensor package for a specific mission, similar to what can be done with U.S. reconnaissance aircraft such as the U-2 and SR-71. In many ways, this gives the X-37B the best of both worlds,” he added.
Here’s a brief look at the potential uses for the X-37B:
On-orbit sensor platform and test bed, with the ability to return payload. “What it offers that we have seldom had is the ability to bring back payloads and experiments to examine how well the experiments performed on-orbit,” said Gary Payton, the undersecretary of the Air Force for space programs. “That’s one new thing for us.”
Given the R&D that likely was put into the X-37B, this approach probably isn’t very cost-effective, but Weeden said this is the most likely use the spaceplane. X-37B payload bay could hold various sensors used for intelligence collection of the Earth from space, potentially including radar, optical, infrared, and signals/electronic intelligence suites to flight-test and evaluate new sensors and hardware.
Deployment platform for operationally responsive space satellites. Weeden said this has a midrange chance of being X-37B’s mission, and he quotes Payton: “We could have an X-37 sitting at Vandenberg or at the Cape, and on comparatively short notice, depending on warfighter requirements, we could put a specific payload into the payload bay, launch it up on an Atlas or Delta, and then have it stay in orbit, do the job for the combatant commander, and come back home. And then the next flight, we could have a different payload inside, maybe even for a different combatant commander.”
But given it still would be dependent on the availability of EELV, it may not have a very quick response time for launch.
On-orbit repair vehicle. Weeden said this option has a fairly low chance of being X-37B’s real mission. While it could be used to rendezvous with malfunctioning satellites and repair or refuel them, the X-37B is limited in altitude (it has been rumored that it will have a maximum altitude range of 700 or 800 km (about 500 nautical miles), potentially high enough to access most Sun-synchronous satellites, but this is unconfirmed, plus not many existing operational military satellite components will fit in the X-37B cargo bay. And as the engineers who tried to figure out how to fix the Hubble Space Telescope robotically, without humans, on-orbit repair is extremely difficult, if not impossible.
On-orbit inspection of satellites. This option has a low potential, as well. The X-37B could be used to rendezvous and inspect satellites, either friendly or adversary, and potentially grab and de-orbit satellites. However, the X-37B cargo bay is much smaller than many operational satellites, and most of the space in the bay is likely to be filled by the required robotic arm and other gear.
Conventional Prompt Global Strike (CPGS) weapon or delivery system. Weedend says that chance of this being X-37B’s mission is zero. It could be launched in response to a pending crisis and remain on orbit for a length of time to respond to high value/very time sensitive targets. However, since the X-37B re-enters like the space shuttle and lands at an estimated 200 mph (321 kph), this means it travels in the atmosphere much slower than a ballistic arc or a hyperkinetic weapon, so it would need to carry conventional explosives to do any significant damage. Also, after re-entry would be a slow moving, not-very-maneuverable glide bomb, easy prey for any air defense system along its path to the target.
For more information, a four-page, fact-filled X-37B Orbital Test Vehicle Fact Sheet is now available on Secure World Foundation’s website.
Source: Secure World Foundation, special thanks to Leonard David.
Hail to His Spiralness, M83
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ESO released a beautiful image today of M83, a classic spiral galaxy. The image was taken by the HAWK-I instrument on ESO’s Very Large Telescope (VLT) at the Paranal Observatory in Chile. The picture shows the galaxy in infrared light and the combination of the huge mirror of the VLT, the large field of view and great sensitivity of the HAWK –I and the superb observing conditions at ESO’s Paranal Observatory makes this one of the sharpest and most detailed pictures of Messier 83 ever taken from the ground. M83 is perhaps a mirror to how our own Milky Way galaxy looks, could we step outside and take a look.
Messier 83 is located about 15 million light-years away in the constellation of Hydra. It is famous for its many supernovae: over the last century, six supernovae have been observed in Messier 83 — a record number that is matched by only one other galaxy. Even without supernovae, Messier 83 is one of the brightest nearby galaxies, visible using just binoculars.
Check out this article by our resident astronomer Tammy Plotner to find out how you can spot M83 in the night sky.
Source: ESO