published on: 2015-11-02 19:01:52
spacestarsandstuff: The beauty queen, Orion nebula.
jets-break-the-soundbarrier: Rafale.
theworldairforce: F-22_Raptor_Cloud by gary_lawrence on Flickr.
startswithabang: Can we test dark energy using the Solar System?“This
Black (Hole) Friday!
100th Anniversary of Einstein’s Theory of Relativity