NASA's Stardust-NExT mission took this image of comet Tempel 1 at 8:38 p.m. PST (11:38 p.m. EST) on Feb 14, 2011. Credit: NASA/JPL-...

This picture of Adenokarzinome splitting is from the Images of Research photo competition . Credit: Lilly Onkologie  First place in t...

This fresh look at the Orion Nebula (Messier 42) is courtesy of the ESO's La Silla Observatory and data unearthed during ESO's Hidd...

With most of the starlight removed from this Hubble image, the sharpest view ever of the narrow spiraling dust lanes of the Whirlpool Galaxy...

WISE image of the spiral galaxies Messier 82 (seen edge-on at the top of the image) and Messier 81 (see face-on at the bottom of the image)....