NASA's Spitzer Space Telescope captured the picture on the left of comet Holmes in February 2008, four months after the comet suddenly erupted and brightened a millionfold overnight.
NASA's Spitzer Space Telescope captured the picture on the left of comet Holmes in February 2008, four months after the comet suddenly erupted and brightened a millionfold overnight.
This painterly portrait of a star-forming cloud, called NGC 346, is a combination of multiwavelength light from three telescopes.
The Cassiopeia A supernova's first flash of radiation makes clumps of dust unusually hot.
A new slide show features a few gems from the cosmos, including sparkling clusters of baby stars and the shimmery demise of a dying star.
Images of life and death in the universe.
NASA's Spitzer Space Telescope is using its infrared eyes to turn the dark and dusty cosmos into a beautiful garden of colorful objects.
In this animation, a seething cauldron of light appears to bubble and ooze around the remains of a giant star that astronomers have been watching tear itself apart for the last 300 years.
Luke Skywalker gazed upon a double sunset in "Star Wars." NASA scientists now believe the universe could be full of planets with sunsets like these.
› View This VideoA big bully of a galaxy has been caught stealing gas -- fuel for stars -- from a nearby, smaller galaxy.
› Play Now