Weekly Links

Down to Earth

Astronauts Stephen Frick and Michael Foreman announced their retirement from NASA this week. If you are interested, NASA maintains an updated list of active astronauts here, which can be easily copied into a spreadsheet. With the addition of the class of 2013 as active astronauts, the number is currently at 46 after recent retirements. Interestingly, the oldest class still represented is the class of 1996, of which Scott Kelly (currently in space) and Peggy Whitson and Jeff Williams (upcoming ISS commanders), are all members.

The National Transportation Safety Board (NTSB) released their findings regarding the accident last fall that destroyed the Virgin Galactic SpaceShipTwo spacecraft and one of its pilots. Their findings are summarized nicely at Parabolic Arc or you can read the longer executive summary of the report. In short, it was indeed the “early unlocking” of the spaceplanes “feather system” that doomed the craft. the NTSB’s analysis found that the risk of human error was not properly taken into account during development.

Rumors out of Russia is that a new “Manned Spaceflight Center”, analogous to NASA’s Johnson Space Center, is in the planning stages, and would be headed by former cosmonaut Sergei Krikalev.

In Orbit

Last weekend, on Saturday, July 25th, ISS flight controllers had to command a debris avoidance maneuver to dodge orbital debris that was headed to the ISS.

Check out this absolutely awesome virtual ISS tour published by ESA and narrated by Samantha Cristoforetti. Some people are calling it “Google Street View on ISS” but it’s really just an old school click-through VR tour. It’s very well done!

ESA is exposing the bacteria found in kombucha to space on the ISS to see how it fares in the harsh environment.

Another cool experiment I learned about while at an ISS payloads meeting in Huntsville, Alabama last week is a small genetic sequencer called minION, which will launch next year.

Peggy Whitson, who will command ISS Expedition 51 in 2017, has joined Twitter!

Speaking of Twitter, here are some good posts from the three tweeters in space right now:

Around the Solar System

The Cassini spacecraft has discovered strange red stripes or streaks on the surface of Saturn’s moon, Tethys. Check it out.

The Curiosity rover is busy investigating some interesting new rocks it has found on the slopes of Mount Sharp on Mars.

Out There

A combination of observations from the HARPS-North ground telescope and NASA’s Spitzer Space Telescope have confirmed the existence of a rocky exoplanet just about 21 light-years away.

While studying another star that is about 20 light-years away, NASA astronomers from JPL have discovered aurora in the atmosphere of a brown dwarf star.

August 1, 2015 1:00 pm

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