701–720 of 804 results

Solar System

Giant "Hurricanes" Ring Saturn's Poles

NASA scientists are scratching their heads over the monstrously large swirls revealed by the Cassini orbiter at the planet's top and bottom.

Space Missions

A Deep (Impact) Mystery

Deep Impact's in-your-face encounter with Comet Tempel 1 on July 4, 2005, created an enormous splash of dust and gas far more massive than anyone predicted. Some 3½ years later, planetary scientists are still struggling to understand what happened.

Solar System

The New Face of Mercury

NASA's Messenger spacecraft slipped past the innermost planet on October 6th, revealing an amazing Mercurian landscape never before seen at close range.

Space Missions

Hubble Shuts Down, Repairs Delayed

With a Space Shuttle poised and ready in Florida to begin the fifth and final Hubble house call, the venerable orbiting observatory has had a malfunction that will probably delay the repair mission until early next year.

Space Missions

Opportunity's Mad Dash

After spending 4½ years doing geologists' bidding on Mars, you'd think that NASA would give its rovers a rest. Instead, one of them has started rolling toward a large crater that it likely won't reach for two years.

Solar System

Rosetta's "Jewel in the Sky"

European scientists are excitedly poring over results from the Rosetta spacecraft's close flyby of asteroid Steins, even though an unexpected camera glitch cost them the best views of its cratered surface.

Space Missions

Phoenix Surpasses 90-day Milestone

NASA's newest lander has now been scratching, digging, sniffing, baking and tasting samples of Martian polar terrain for more than three months. How long can it survive in the fast-approaching winter — and how much more can it learn?

Space Missions

NASA Space Observatory Gets New Name

The best-ever gamma-ray satellite is living up to expectations and NASA has just given it a new name.

Solar System

New Enceladus Closeups Now Arriving

The Cassini spacecraft is returning the data from Monday's close flyby of icy Enceladus, and NASA is putting up the first raw images.

Space Missions

Titan Makes a Splash

It's not covered by a global ocean, as theorists once thought. But Saturn's big moon does sport pools of liquid ethane big enough to float anyone's boat.

NASA logo

Astronomy and Society

NASA Turns 50: Take a Photo!

The U.S. space agency was founded 50 years ago today. You can celebrate by finding your favorite NASA photograph.

Solar System

An Electrifying Whodunit

Thanks to a quintet of identical spacecraft, space physicists have settled a decades-old debate over what triggers violent electromagnetic substorms inside Earth's magnetosphere.

Space Missions

Earth and Moon Dance for a Far Camera

From more than 30 million miles away, a NASA spacecraft snapped away as the Moon made a graceful pass in front of Earth's colorful disk.

Space Missions

Mars's Ancient Water Works

New observations from a NASA orbiter reveal that water and rock freely mingled across (or under) much of the Red Planet's surface.

Space Missions

Mercury: The Incredible Shrinking Planet

During its first flyby of Mercury, NASA"s Messenger spacecraft found much less iron on the planet’s surface than expected and a cloud of ionized atoms — including water — caught up in the planet’s magnetosphere. And that’s just for starters.

Solar System

SOHO Tallies Its 1500th Comet

The Solar and Heliospheric Observatory has now found more comets than all other comet discoverers put together — not bad for a spacecraft that was designed to study the Sun.

Ulysses spacecraft

Space Missions

Ulysses' Space Odyssey Ends on July 1st

The only space mission ever to study the Sun’s poles directly will turn off at month’s end after a long life of trial and triumph.

Space Missions

GLAST Heads Up, Up, and Away!

NASA's newest space observatory is safely in orbit and getting ready to probe the high-energy universe.

Solar System

Moonlets Perturb Saturn’s Ring

New observations from Cassini show small satellites are responsible for Saturn's F ring looking a little frazzled.

Space Missions

NASA UV Satellite Powers Down

After five years in orbit, CHIPSat enters a hibernation that may — or may not — be permanent.