published on: 2016-02-22 21:43:40
Gravitational waves from black holes detected - BBC News
spaaaaaceblog: NASA are giving away 14 futuristic space posters
aerospaceage: Titan
n-a-s-a: This stamp featuring the Soyuz, Mercury, and Gemini
nasahistory: A beautiful picture of a windsock.
jb2489.tumblr.com/post/142719004345/