Images from Hubble show light echo surrounding V838 from 2002 to 2006.
First time ever, a pulsar wind nebula is imaged in high-energy X-rays.
How stars blow up is a mystery finally being unraveled.
Two "ultraluminous" black holes shine brightly in one galaxy.
Images of Circumnuclear Ring (CNR) at the center of the Milky Way Galaxy.
Composite image shows solar-type stars under Small Magellanic Cloud wing.
Image from Hubble Space Telescope shows close encounters between galaxies.
Chandra X-ray data shows a hot gas cloud caused by colliding galaxies.
Artist's concept depicts Voyager 1 entering the interstellar medium.
Composite image of the giant barred spiral galaxy NGC 6872.
Andromeda galaxy as observed by the Hubble Space Telescope.
Diagrams show super-Earth-size planets discovered by Kepler.