International Space Station astronaut Terry Virts (@AstroTerry) tweeted this image of a Vulcan hand salute from orbit as a tribute to actor Leonard Nimoy, who died on Friday, Feb. 27, 2015.
NASA's Space to Ground is your weekly update on what's happening aboard the International Space Station.
True color look at the contiguous US from Suomi NPP on 26 February 2015. Larger image
On December 27, 2014, while scanning the southern sky as part of the Dark Energy Survey, researchers snapped a shot of comet Lovejoy.
The galaxy pictured here is NGC 4424, located in the constellation of Virgo. It is not visible with the naked eye but has been captured here with the NASA/ESA Hubble Space Telescope.
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