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http://www.science20.com/157032 at http://www.science20.com: Could A Star Orbit A Planet? - Just For Fun
Science 2.0

Direct link Could A Star Orbit A Planet? - Just For Fun

1 Sep 2015, 12:13 UTC
http://feeds.feedburner.com/26e068c8-e3c5-e231-14a1-7a9e3cfa0e98: Urban Planning: Cities Seen From Space: Photos
Discovery News - Space News

Direct link Urban Planning: Cities Seen From Space: Photos

1 Sep 2015, 11:00 UTC
tag:blogger.com,1999:blog-6633940777526327846.post-6840330197639940726: Failure Was an Option: What If a Crew Became Stranded On Board the Skylab Space Station? (1972)
DSFP's Spaceflight History Blog

Direct link Failure Was an Option: What If a Crew Became Stranded On Board the Skylab Space Station? (1972)

1 Sep 2015, 01:14 UTC <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody><tr><td style="text-align: center;"><a href="http://4.bp.blogspot.com/-4bQmHnSXqkU/VeTLrHzhhTI/AAAAAAAAYho/xqs2LjWvg8Y/s1600/0100728.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" src="http://4.bp.blogspot.com/-4bQmHnSXqkU/VeTLrHzhhTI/AAAAAAAAYho/xqs2LjWvg8Y/s640/0100728.jpg" /></a></td></tr><tr><td class="tr-caption" style="text-align: center;">Image credit: NASA</td></tr></tbody></table>On 28 July 1973, the Skylab 3 crew of Alan Bean, Jack Lousma, and Owen Garriott lifted off from Launch Pad 39B at Kennedy Space Center, Florida, bound for the Skylab Orbital Workshop in Earth orbit. Despite their mission's numerical designation, they were the second crew to visit Skylab; in a move guaranteed to generate confusion for decades to come, NASA had designated as Skylab 1 the unmanned Workshop launched on 14 May 1973, and had dubbed the first crew visit Skylab 2.<br /><br />The Skylab 3 Apollo Command and Service Module (CSM), designated CSM-117, separated from the S-IVB second stage of its Saturn IB launch vehicle and began maneuvering to catch up with Skylab. During final approach to the Workshop, one of the four steering thruster quads on CSM-117 began to leak nitrogen tetroxide oxidizer from its forward-firing engine valve. The crew dutifully shut off the quad and used the three quads remaining to complete docking without further incident.<br /><br />On 2 August, a second quad began to leak, raising fears that tainted nitrogen ...
tag:blogger.com,1999:blog-1014682403395027648.post-460498574816974796: Red Dwarf Star with a Cold Neptune-Mass Planet
Beyond Earthly Skies

Direct link Red Dwarf Star with a Cold Neptune-Mass Planet

31 Aug 2015, 22:00 UTC <div class="separator" style="clear: both; text-align: center;"><a href="http://2.bp.blogspot.com/-KLK6B_xrF8A/VeSFhAHbu_I/AAAAAAAAHtM/YaT7HhhHpZI/s1600/Post%2B-%2BSeptember%2B2015%2B%25281%2529%2B-%2B1.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="338" src="http://2.bp.blogspot.com/-KLK6B_xrF8A/VeSFhAHbu_I/AAAAAAAAHtM/YaT7HhhHpZI/s640/Post%2B-%2BSeptember%2B2015%2B%25281%2529%2B-%2B1.jpg" width="640" /></a></div><div style="text-align: center;"><span style="font-family: inherit;">Figure 1: Artist’s impression of a cold Neptune-mass planet.</span></div><span style="font-family: inherit;"><br /></span><span style="font-family: inherit;">Combining observations by the Spitzer space telescope and observations by ground-based telescopes, Street et al. (2015) present the discovery of a cold Neptune-mass planet in orbit around a red dwarf star. The planet was detected using a technique known as gravitational microlensing, whereby the gravitational field of a foreground object, in this case, the newfound planet and its host star, acts as a lens, magnifying the light of a more distant background star.</span><br /><span style="font-family: inherit;"><br /></span><span style="font-family: inherit;">As the planet and its host star crossed the line of sight to the background star, it caused the brightness of the background star to change with time. The change in brightness was observed in the form of a light curve. The gravitational microlensing event is designated as OGLE-2015-BLG-0966, and the planet is identified as OGLE-2015-BLG-0966b, with the lowercase suffix “b” indicating its planetary nature.</span><br /><span style="font-family: inherit;"><br /></span><span style="font-family: inherit;">By analysing the light curve, the planet is estimated to have 21 ± 2 times the mass of Earth and ...
http://www.airspacemag.com/daily-planet/life-detection-experiment-might-be-added-europa-mission-180956460/: Life Detection Experiment Might Be Added to Europa Mission
Air & Space Magazine

Direct link Life Detection Experiment Might Be Added to Europa Mission

31 Aug 2015, 19:32 UTC

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