Gallery: Galaxies Collide in New Images Released for Hubble's 18th Birthday

Four Online Telescopes Serve the Stars to Interstellar Paparazzi

NASA captures dynamic Martian avalanche

NASA Takes Aim at Moon with Double Sledgehammer

Lunar eclipse to occur Wednesday night

Scientists and amateurs find new solar system
Scientists Find Solar System Like Ours

NASA'sMessenger Probe Shows Hundred-Mile Cliffs on Mercury

Messenger reveals a new side of Mercury

Caught on tape: Death star galaxy

See Mars Now: Red Planet Shines Bright

See Tonight's 'Great' Meteor Shower

Energy source of northern lights found

Best Meteor Shower of 2007 Peaks Dec. 13

'Flying Saucers' Around Saturn Explained

Gordon and Betty Moore Foundation Commits $200 Million Support for Thirty-Meter Telescope

"Ultracool" Dwarf Star Is Clearly Monty Python Fan

A Complete Solar Cycle from SOHO

Launch and installation of the Columbus science module (blog)

Hunt for planets in other solar systems. PlanetQuest (NASA)

Astronomy Picture of the Day Archive (NASA)

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