Consider it an early Christmas gift: On Dec. 24th the Moon and Mars are putting on a beautiful late-night sky show.

A powerful jet from a supermassive black hole is blasting a nearby galaxy and possibly causing profound problems for planets in the jet's path.

The solar physics community is abuzz this week. No, there haven't been any great eruptions or solar storms. The source of the excitement is a modest knot of magnetism that popped up on the sun, possibly heralding the start of a new solar cycle.

NASA's fleet of THEMIS satellites have made some surprising new discoveries about outbursts of Northern Lights and the source of their power. The discoveries include giant magnetic ropes that connect Earth to the Sun and explosions in the outskirts of Earth's magnetic field.

Astronomers using Japan's Hinode spacecraft have discovered a major new form of solar activity: abundant x-ray jets.

Mark your calendar: The best meteor shower of 2007 peaks on Friday, December 14th.

From the deserts of the American southwest to the pine forests of the Deep South, drought-weary residents have one thing on their minds: "I wish it would rain!" Technically, what they should be wishing for is "more streamflow." Find out why in today's story.

Astronomers using NASA's Chandra X-ray Observatory have discovered one of the fastest stars ever seen--a "cosmic cannonball" that is challenging theories to explain its blistering speed.

New research by NASA scientists shows that moondust kicked up by the jets of lunar landers can go on a fantastic journey, completely circling the Moon before settling back to the ground. This interesting phenomenon may affect the planning of lunar outposts and other activities as NASA prepares its return to the Moon.

During the past month, Mars has doubled in brightness and now it is putting a nice show for backyard stargazers. A good night to look is Nov. 26th when Mars has an eye-catching close encounter with the Moon.

NASA scientists have developed a fast and easy-to-build satellite named FASTSAT that could accelerate the pace of space exploration.

How do you bring a 200,000-pound rocket booster back to Earth after it catapults its payload toward the moon? NASA has answered that question with a successful test of a giant "moon rocket" parachute in the Arizona desert.

Scientists are converging on Ethiopia this week to discuss a new and strange form of space weather over Africa.

NASA-supported scientists are working on a new device to help predict the sudden transformation of tropical storms to deadly hurricanes.

NASA-supported scientists have discovered cellular repair shops where DNA broken by space radiation may be put back together again.

On Monday morning, Nov. 5th, space shuttle Discovery is scheduled to undock from the ISS while the pair are gliding over many US towns and cities. The two spaceships will cut across a glittering expanse of morning stars dotted by bright planets and a Venus-Moon conjunction. And don't forget the exploding comet! It all adds up to "A Fantastic Monday Morning Sky Show."

Do you love gazing at a starry night sky? Nothing you've ever seen on Earth could prepare you for the fantastic skies of some "orphan stars" just discovered by astronomers using NASA's Chandra X-ray Observatory.

The Cassini spacecraft has discovered three new lakes near the south pole of Saturn's moon Titan. These strange bodies are filled not with water but liquid methane and ethane. Researchers are also studying a lake near Titan's north pole larger than Lake Superior.

Last week, cameras in Iowa captured a giant atmospheric wave passing over Des Moines--see the movie in today's story. Atmospheric scientists believe these waves, called undular bores, may be more common and important than previously thought.

Fifty years after the launch of Sputnik kicked off the Space Age, an ultra-modern probe heading for Pluto is using retro Sputnik-like tones to communicate with Earth.

Earlier this year, Comet Encke was passing a little too close to the Sun when a coronal mass ejection (CME) hit the comet and ripped off its tail. NASA's STEREO spacecraft was watching and recorded a must-see movie featured in today's story.

Researchers from the Marshall Space Flight Center have built a new "lunar impact" observatory in rural north Georgia. They're using it for their own cutting edge research and sharing the facility with local middle- and high-school students.

NASA's Dawn spacecraft has left Earth on a mission to explore the giant asteroids Ceres and Vesta. Today's Science@NASA story explains the scientific reasons for making the trip.

Two years ago, NASA's Deep Impact spacecraft blasted a hole in Comet Tempel 1, offering researchers their first look inside a comet. One small problem: The cloud of debris was so thick no one could clearly see the crater. But now the dust has cleared and another NASA spacecraft is returning to the scene to examine the hole Deep Impact wrought.