Detailed Dark Matter Map Yields Clues to Galaxy Cluster Growth

Astronomers using NASA's Hubble Space Telescope took advantage of a giant cosmic magnifying glass to create one of the sharpest and most detailed maps of dark matter in the universe...

Status Update: Cassini to Resume Nominal Operations

Engineers at NASA's Jet Propulsion Laboratory, Pasadena, Calif., expect the Cassini spacecraft will resume normal operations on Nov. 24...

NASA's Fermi Telescope Finds Giant Structure in our Galaxy

NASA's Fermi Gamma-ray Space Telescope has unveiled a previously unseen structure centered in the Milky Way. The feature spans 50,000 light-years and may be the remnant of an eruption from a supersized black hole...

Sunspot 1121 Unleashes X-ray Flare

On Saturday, Active Region 1112 unleashes an M class solar flare...

Global View of Fine Aerosol Particles

Of all the pollution that fills our lungs on any given day, the most dangerous is the small stuff...

Engineers Assessing Cassini Spacecraft

Engineers at NASA's Jet Propulsion Laboratory are working to understand what caused NASA's Cassini spacecraft to put itself into "safe mode," a precautionary standby mode...

Ask an Expert: Why Study Comets, Meteors and Asteroids?

What do we learn from studying comets, meteors and asteroids? On Friday, Nov. 5 from 10:00 a.m. to noon EDT, NASA expert Bill Cooke will answer your questions...

NASA EPOXI Flyby Reveals New Insights Into Comet Features

NASA's EPOXI mission spacecraft successfully flew past comet Hartley 2 at 10 a.m. EDT Thursday. Scientists say initial images from the flyby provide new information about the comet's volume and material spewing from its surface...

Thawing a Planet-Sized Snowball

The Earth has plunged into a deep freeze several times in the past, with ice covering the land and sea for millions of years...

The Many Infrared 'Personalities' of the Sculptor Galaxy

The Sculptor galaxy is seen in a rainbow of infrared colors by NASA's Wide-field Infrared Survey Explorer, or WISE...

Webb Telescope Sunshield Passes Launch Depressurization Tests to

NASA's James Webb Space Telescope continues to make significant progress, successfully completing a series of sunshield vent tests that validate the telescope's sunshield design...

Explore Energy with NASA during Earth Science Week

"Exploring Energy" is the theme of this year's Earth Science Week, Oct. 10-16. The American Geological Institute hosts Earth Science Week each year to engage people in Earth science and encourage stewardship of Earth...

Hubble Observes Aftermath of Possible Asteroid Collision

NASA's Hubble Space Telescope has captured rare images of a suspected asteroid collision. The snapshots show a bizarre X-shaped object at the head of a comet-like trail of material. Their findings will be published in the Oct. 14th issue of Nature...

Exposed Rocks Point to Water on Ancient Mars

A new discovery of carbonate-bearing rocks on Mars indicates that habitable environments may have existed deep below the martian crust. The rock deposit, which was uplifted by an ancient meteor impact, also provides information about the potential existence of lakes and seas in Mars' past...

Giant Star Goes Supernova, Smothered by its Own Dust

A giant star in a faraway galaxy recently ended its life with a dust-shrouded whimper instead of the more typical bang...