Mars Reconnaissance Orbiter photographs Comet Siding Spring

During Comet Siding Spring’s flyby of Mars on Sunday Mars Reconnaissance Orbiter was able to capture an image of the comet’s nucleus.

Prior to its arrival near Mars astronomers estimated the nucleus or cometโ€™s core diameter at around 0.6 mile (1 km). Based on these images, where the brightest feature is only 2-3 pixels across, its true size is shy of 1/3 mile or 0.5 km.

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Mars orbiters survive comet fly-by

Press releases from science teams for Mars Reconnaissance Orbiter, MAVEN, and Mars Odyssey confirm that all three spacecraft are functioning properly after Comet Siding Spring’s fly-by of Mars today.

All three spacecraft also did observations of the fly-by, the data of which will take a few days to download. Stay tuned.

Update: Europe’s Mars Express and India’s Mangalyaan orbiters are also reported to have escaped damage during the fly-by.

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The X-37B goes to Mars

After 675 days in space, the Air Force’s reusable X-37B mini-shuttle successfully returned to Earth today, completing its second flight in space.

There has been a lot of speculation about the secret payloads that the two X-37B’s have carried into space. The Air Force has been very tight-lipped about this, though they have said this:

“The primary objectives of the X-37B are twofold: reusable spacecraft technologies for America’s future in space, and operating experiments which can be returned to, and examined, on Earth,” Air Force officials wrote in on online X-37B fact sheet. “Technologies being tested in the program include advanced guidance, navigation and control; thermal protection systems; avionics; high-temperature structures and seals; conformal reusable insulation, lightweight electromechanical flight systems; and autonomous orbital flight, re-entry and landing,” they added.

The obvious advantage of the X-37B is that it allows the Air Force to test these new technologies in space, then bring them back to Earth for detailed analysis.

However, I think the most important engineering knowledge gained from this flight will not be from the payload, but from the X-37B itself.
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Virgin Galactic outlines near term test flight schedule

The competition heats up: In a newspaper interview, the CEO of Virgin Galactic has outlined the company’s flight plans for SpaceShipTwo in the coming months, leading hopefully to its first commercial flights.

โ€œWe expect to get to space altitude in a short number of flights, assuming the rocket performs as expected,โ€ Whitesides told the Journal. โ€œScaled made it to space in four flights with SpaceShipOne. I believe it will be a little more than that for us, but not dramatically so.โ€

Once SpaceShipTwo successfully reaches space, Scaled Composites will turn over the rocket to Virgin Galactic for its commercial operations based in New Mexico. Virgin has already taken control of the mothership, which it flew to Spaceport America for some initial test operations in September. โ€œOnce we take control of SpaceShipTwo, we expect to do some more testing here in New Mexico, but that will primarily be efficiency testing rather than technology testing,โ€ Whitesides said. โ€œIt will give pilots an opportunity to train at this airfield after Mojave to practice things like coming in on final approach.โ€

As much as I have expressed strong skepticism in recent months of Virgin Galactic’s promises, I truly hope this happens, and soon.

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Comet 67P/C-G at 2 feet per pixel

New images from Rosetta, now about 6 miles from the surface of Comet 67P/C-G, show details as small as 2 feet across.

Go to the link to see some images. If you were hiking there, these images would see you.

In related news, the Rosetta team is asking the public to help name the landing site for its Philae lander.

As the location of the first soft landing of a human-made object on a comet, the site, currently identified as Site J, deserves a meaningful and memorable name that captures the significance of the occasion. The rules are simple: any name can be proposed, but it must not be the name of a person. The name must be accompanied by a short description (up to 200 words) explaining why this would make the ideal name for such an historic location. A jury comprising members of the Philae Steering Committee will select the best name from the entries, and the winning proposer will be invited to follow the landing in person from ESAโ€™s mission control centre in Darmstadt, Germany on 12 November.

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Sierra Nevada fights back

The company that wants to build Dream Chaser has filed a lawsuit to prevent NASA from proceeding with its contracts with Boeing and SpaceX.

When Sierra Nevada had first protested the contract awards, NASA had first suspended work, then decided to allow work to go forward. This lawsuit is to prevent that from happening until after Sierra Nevada’s protest is resolved.

Here’s what I think is happening: Sierra Nevada has said it is going to submit a bid to NASA for the agency’s second round of cargo flights to ISS, proposing Dream Chaser as one of those unmanned freighters. By playing hard ball now with the manned contact awards, the company is creating leverage with NASA. Though no one can say this publicly, I am sure they are making it clear privately that if they get picked for the cargo contract, they will drop both their lawsuit and protest.

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Another succesful rocket launch for India

The competition heats up: India today successfully launched the third of seven home-built GPS satellites.

The head of ISRO, India’s NASA, also noted after the launch that the next test flight of their much larger GSLV rocket should occur within the next six weeks. If things go as expected, that flight will also include a test flight of an engineering prototype of an India-built manned capsule.

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