By precisely tracking NASA's Cassini spacecraft on its low swoops over Saturn's moon Titan, scientists have determined the distribution of materials in the moon's interior.

Like a hard-driving athlete whose joints need help, the giant "Mars antenna" at NASA's Deep Space Network site in Goldstone, Calif. has begun major, delicate surgery.

Watch school teams test their software-enabled Lego robots via a live Internet program during the annual Southern California NASA Explorer Schools Robotics Competition.

One year ago this week, NASA's Kepler mission soared into the dark night sky, leaving a bright glow in its wake as it began to search for other worlds like Earth.

The Herschel Space Observatory has revealed the chemical fingerprints of potentially life-enabling organic molecules in the Orion nebula.

Mars has diversity. In at least one area, Martian sand dunes are actively migrating. In another, they have been stationary for 100,000 years.

NASA, in cooperation with local technology firms and sponsors, launches a nationwide series of high school robotics competitions that begin March 5 and 6.

Planetary scientists, who have been puzzling for years over the surface features on Saturn's moon Titan, have now found some recognizable analogies to a type of terrain on Earth known as karst topography.

NASA's newest Mars orbiter has passed a data-volume milestone unimaginable a generation ago and still difficult to fathom - 100 terabits.

Extensive radar mapping of the middle-latitude region of northern Mars shows that thick masses of buried ice are quite common beneath protective coverings of rubble.

The Feb. 27 magnitude 8.8 earthquake in Chile may have shortened the length of each Earth day.

NASA's Aquarius instrument, and the Argentinian spacecraft that will carry it into space, rode out the Feb. 27 Chilean earthquake without a scratch.

On Tuesday, March 2, 2010, NASA's Cassini spacecraft will make its closest encounter yet with Saturn’s second largest moon.

NASA's Phoenix Mars Lander showed no sign during February that it has revived itself after the northern Mars winter.

NASA has selected seven scientists as recipients of Carl Sagan Postdoctoral Fellowships in exoplanet exploration for 2010.

NASA officials broke ground near Canberra, Australia on Wednesday, Feb. 24, beginning a new antenna-building campaign to improve Deep Space Network communications.

NASA's Mars Odyssey began a second campaign Monday to check on whether the Phoenix Mars Lander has revived itself after the northern Martian winter.

NASA has launched a new Web page to help people better understand the causes and effects of Earth's changing climate.

Newly released images from Cassini's November swoop over Saturn's icy moon Enceladus reveal a forest of new jets spraying from prominent fractures crossing the south polar region.

The ocean plays a key role in determining Earth’s temperatures, and, say NASA scientists, could well contribute to making 2010 the warmest year on record.

A new image gallery on NASA's Global Climate Change Web site highlights some dramatic examples of how our planet is changing over time.

A new webcam at NASA's Jet Propulsion Laboratory is keeping an eye on debris and water flows that could course down nearby wildfire-stripped hillsides during a rainstorm.

Like the battered white whale Moby Dick taunting Captain Ahab, Saturn's moon Prometheus surges toward the viewer in a 3-D image from NASA's Cassini spacecraft.

In 2007, the Arctic lost a massive amount of thick, multiyear sea ice, contributing to that year's record-low extent of Arctic sea ice.

Just three days shy of one year before its flyby of comet Tempel 1, Stardust has successfully performed a maneuver to adjust its encounter time by eight hours and 20 minutes.

A dramatic 3D Mars view based on terrain modeling from NASA's Mars Reconnaissance Orbiter data shows "highs and lows" of Mojave Crater.

The most prominent asteroid in the sky is currently yours for the perusing with binoculars -- and perhaps even the naked eye.

A diverse cast of cosmic characters is showcased in the first survey images NASA released Wednesday from its Wide-field Infrared Survey Explorer, or WISE.

A new NASA study finds undersea melting of glaciers in west Greenland due to ocean warming is playing a major, previously overlooked, role in their evolution.

Blazing through its closest pass of the Saturnian moon Mimas on Feb. 13, Cassini sent back striking close-ups of the moon likened to the Death Star from "Star Wars" and the enormous crater scarring its surface.

On Feb. 14, 1990, NASA's Voyager 1 had sailed beyond the farthest planet in our solar system and snapped an image that was a parting valentine to our string of planets.

NASA's Mars Exploration Rover Spirit is now parked for the winter.

On Feb. 13, 2010, NASA's Cassini spacecraft will make its closest examination yet of Mimas, Saturn's eyeball-shaped moon that has also been likened to the Death Star of "Star Wars."

WISE has discovered its first comet, one of many objects the mission is expected to find during its ongoing infrared survey of the sky.

Hundreds of exposed rock layers near the center of a Martian crater reveal a record of major environmental changes on Mars billions of years ago.

JPL, NASA and the Small Business Administration are hosting the annual High-Tech Conference for Small Business on Tuesday, March 2, and Wednesday, March 3, at the Westin Hotel in Los Angeles.

Artwork inspired by NASA's Spitzer Space Telescope is making an appearance at this year's Winter Olympics in Vancouver, British Columbia.

NASA radar imaging flights over Central America, Haiti and the Dominican Republic are in the second week of a three-week campaign.

NASA will extend the international Cassini-Huygens mission to explore Saturn and its moons to 2017.

NASA astronomers have successfully demonstrated that a David of a telescope can tackle Goliath-size questions in the quest to study Earth-like planets around other stars.

JPL's Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) captured this false-color composite image of the city of Port-au-Prince, Haiti, and the surrounding region.

Argentina's president got an up-close look at NASA's Aquarius instrument at the Argentine facility where it's being integrated with the SAC-D spacecraft.

Looking for all intents and purposes like a celestial egg after a session in Saturn's skillet, Prometheus displayed its pockmarked, irregular surface for NASA's Cassini spacecraft on Jan. 27, 2010.

Climate change can be a daunting topic for most adults to grasp, let alone kids.

Sixteen days after last visiting Saturn's largest moon, NASA's Cassini spacecraft returns for another look-see of the cloud-shrouded moon - this time from on high.

NASA has added a series of overflights of quake faults in Haiti and the Dominican Republic to a previously scheduled three-week airborne radar campaign to Central America.

After six years of unprecedented exploration of the Red Planet, NASA's Mars Exploration Rover Spirit no longer will be a fully mobile robot.

Hills with a wrinkly radial pattern stand out in a new radar image captured by NASA's Cassini spacecraft on Dec. 28, 2009.

NASA's Wide-field Infrared Survey Explorer, or WISE, has spotted its first never-before-seen near-Earth asteroid, the first of hundreds it is expected to find during its mission to map the whole sky in infrared light.

NASA's Mars Odyssey orbiter has completed all 30 relay overflights of the Phoenix landing site that were scheduled for Jan. 18 to 21, and heard nothing from the lander.

NASA's Mars exploration rover Opportunity is allowing scientists to get a glimpse deep inside Mars.

The rover team has begun driving Spirit backward as next technique for attempting to extricate the rover from the sand trap where it is embedded.

A new study links ozone levels above western North America in springtime to pollution from abroad. JPL lidar and balloon data contributed to the findings.

NASA's Mars Odyssey orbiter has completed 11 overflights, listening for the Phoenix Mars Lander on Jan. 19 and 20, without hearing anything from the lander.

JPL research scientist Tim Liu has been honored by the American Meteorological Society for his space-based research on Earth's climate.

Scientists Taking Suggestions on Where to Image the Red Planet Using NASA Satellite

Landslides from the Jan. 12 Haiti earthquake are clearly visible in a new simulated natural-color image from an instrument on NASA’s Terra spacecraft.

JPL Oceanographer Josh Willis was among 100 outstanding early career scientists honored by President Obama Jan. 13 at the White House.

The fault responsible for the Jan. 12 magnitude 7.0 earthquake that devastated Haiti is visible in images created using NASA radar topography data acquired in 2000.

The Huygens probe parachuted down to the surface of Saturn's haze-shrouded moon Titan exactly five years ago on Jan. 14, 2005, providing data that scientists on NASA's Cassini mission to Saturn are still building upon today.

NASA's Wide Field Infrared Survey Explorer (WISE) began its survey of the infrared sky today.

Dunes of sand-sized materials have been trapped on the floors of many Martian craters. This view shows dunes inside a crater in Noachis Terra, west of the giant Hellas impact basin in Mars' southern hemisphere.

The list of remaining maneuvers being considered for extricating Spirit is becoming shorter.

Asteroid 2010 AL30 will fly safely past Earth on Jan. 13. There are those who say it may be a used rocket stage. Not so fast says NASA's Near-Earth Object Office.

Four NASA space telescopes -- Hubble, Spitzer, the Galaxy Evolution Explorer and Swift— help probe a dinosaur-like find of galactic proportions.

Interactive museum exhibits about climate change, Earth science, and missions beyond Earth are among the projects NASA has selected to receive agency funding.

NASA'S Cassini spacecraft will return to Titan's southern hemisphere on a flyby tomorrow, Jan. 12, plunging to within about 1,050 kilometers (about 670 miles) of the hazy moon's surface.

Beginning Jan. 18, NASA's Mars Odyssey orbiter will listen for possible, though improbable, radio transmissions from the Phoenix Mars Lander, which completed five months of studying an arctic Martian site in November 2008.

Martian landforms shaped by winds, water, lava flow, seasonal icing and other forces are analyzed in 21 journal reports based on data from a camera orbiting Mars.

Blobs of warm ice that periodically rise to the surface and churn the icy crust on Saturn's moon Enceladus explain the quirky behavior of the moon's south polar region.

NASA's Wide-field Infrared Survey Explorer, or WISE, has captured its first look at the starry sky that it will soon begin surveying in infrared light.

A former director of NASA's Jet Propulsion Laboratory, Lew Allen Jr., passed away Monday night, Jan. 4, at the age of 84, in Potomac Falls, Va.

NASA's Spitzer Space Telescope has captured an action-packed picture of the nearby Small Magellanic Cloud, a small galaxy that looks like a wispy cloud when seen from Earth.

For almost two centuries, humans have looked up at a bright star called Epsilon Aurigae and watched with their own eyes as it seemed to disappear into the night sky.

NASA's Kepler space telescope, designed to find Earth-size planets in the habitable zone of sun-like stars, has discovered its first five new exoplanets, or planets beyond our solar system.

NASA's Mars rover Spirit will mark six years of unprecedented science exploration and inspiration for the American public on Sunday.

NASA has selected three proposals as candidates for the agency's next space venture to another celestial body in our solar system.

Though there are no plans to investigate whether Saturn's moon Titan has a Santa Claus, NASA's Cassini will zoom close to Titan's north pole this weekend.

Like sugar plum fairies in "The Nutcracker," the moons of Saturn performed a celestial ballet before the eyes of NASA's Cassini spacecraft.

An astronomy team that includes JPL scientists has probed the inner structure of a dust disk around a star using the Keck Interferometer.

NASA Research Confirms Complex Motions of Earth's Churning, Burning Liquid Core

Spirit's drive on Sol 2120 (Dec. 19, 2009) included commands for using all six wheels.

Engineers are getting ready to eject the cover on NASA's Wide-field Infrared Survey Explorer, which launched from Vandengerg Air Force Base, Calif., on Dec. 14.

A JPL satellite launched 10 years ago this week continues to improve climate change predictions by tracking how much of the sun's energy reaches Earth.

A new JPL study examines the impact recent variability in climate is having on the surface temperatures of large lakes in California and Nevada.

Spirit's right-front wheel, which had stopped operating in March 2006, revolved with apparently normal motion during the first three of four driving segments on Sol 2117 (Wednesday, Dec. 16) but stopped early in the fourth segment of the drive.

At the age of 10, NASA's flagship Terra spacecraft continues to enrich our understanding of Earth's ocean, land and atmosphere.

The Herschel Space Observatory, a European Space Agency mission with important NASA/JPL participation, has revealed a surprising amount of activity in the Eagle nebula.

NASA's Cassini Spacecraft has captured the first flash of sunlight reflected off a lake on Saturn's moon Titan, confirming the presence of liquid on the part of the moon dotted with many large, lake-shaped basins.

Researchers are receiving new science data from NASA's Mars Reconnaissance Orbiter after the spacecraft's six science instruments resumed observations today.

Diagnostic tests were run on Spirit's right-rear wheel and right-front wheel on Sol 2113 (Dec. 12, 2009).

NASA's Wide-field Infrared Survey Explorer, or WISE, lifted off over the Pacific Ocean this morning on its way to map the entire sky in infrared light.

Researchers studying carbon dioxide, a leading greenhouse gas and a key driver of global climate change, now have a new tool at their disposal.

NASA data show California's primary agricultural area and major mountain water source lost nearly enough groundwater since fall 2003 to fill America's largest reservoir.

WISE has launched from Vandenberg Air Force Base, Calif.

Two JPL college interns delving into California's rainfall records have uncovered some interesting findings that may be linked to climate change.

When it flies by Saturn's largest moon, Titan, this weekend, NASA's Cassini spacecraft will study the interactions between the magnetic field of Saturn and Titan.

The launch of NASA's Wide-field Infrared Survey Explorer (WISE) is now rescheduled for Dec. 14.

Results of diagnostic tests on Spirit's right-rear wheel on Sol 2109 (Dec. 8, 2009) continue to indicate a troubled wheel, which may leave the rover with only four operable wheels.

Liftoff of a Delta II rocket and its NASA payload, the Wide-field Infrared Survey Explorer (WISE), has been delayed 24 hours.