ISS Expedition 42/43 Crew Departs Star City for Baikonur Cosmodrome in Kazakhstan

Fast Evolution of a Galaxy: Artist's Illustration

Compass & Scale Image for Outflows from 12 Merging Galaxies

NASA X-ray Telescopes Find Black Hole May Be Neutrino Factory

Sun Snaking Filament Eruption | NASA SDO

NASA Expedition 41 Flight Engineer Reid Wiseman Returns Home!

Philae Comet 67P Landing: Nov. 13, 2014 Media Briefing | ESA

Searching for Philae's Comet Landing Site | ESA Rosetta Mission

Comet 67P Panorama: Artist Illustration of Lander Orientation

First Comet 67P Panorama from Philae Lander | ESA Rosetta

Philae Touchdown: Comet Lander Status & First Descent Image

Welcome to Comet 67P: Philae's first picture on surface! | ESA

Philae Descending to Comet 67P: Wide-angle view | ESA Rosetta

Philae's Descent to Surface of Comet 67P | ESA Rosetta Mission

Philae Lander's View of Comet 67P from 40 meters away | ESA

As the sun rises or sets, its rays travel through the atmosphere which acts as a prism illuminating | NASA Astronaut Barry Wilmore | International Space Station

As the sun rises or sets, its rays travel through the atmosphere which acts as a prism illuminating #ISS -#AstroButch http://t.co/k6MfRUxbgl

— Intl. Space Station (@Space_Station) November 17, 2014