At long last, astronomers have found one of the Milky Way's mysteriously missing supernovas.

NASA's Phoenix lander is getting ready to touch down on Mars and begin an unprecedented investigation of the Red Planet's arctic realm.

Astronauts are using a Star Trek tricorder-like device to keep track of microscopic life forms onboard the International Space Station.

A NASA-funded survey set to begin in 2008 could dramatically increase the number of known planets outside our solar system.

In September 1859, a solar flare erupted so intense that the explosion itself was visible to the human eye. A ferocious geomagnetic storm ensued in which Northern Lights descended as far south as Cuba, the Bahamas and Hawaii. Meanwhile, telegraph engineers disconnected their batteries and powered communications by electricity from the auroras! Could it happen again?

Today, NASA-funded researchers released to the general public a new "4D" live model of Earth's ionosphere. Without leaving home, anyone can now fly through the layer of ionized gas that encircles Earth at the edge of space itself.

An experiment in space has shed new light on the puzzling physics of some everyday substances such as blood, ketchup, motor oil and whipped cream.

Going to the Moon? Don't forget your duct tape. Thirty-six years ago when Apollo 17 astronauts found themselves a quarter million miles from home with a damaged moonbuggy, a roll of "good old fashioned American gray tape" saved the day.

NASA-supported researchers have realized that strange things may be happening on the full Moon when it gets hit by Earth's magnetic tail.

Unlike Earth, the firmament of the moon is directly exposed to charged particles from the sun. What happens to moondust under the onslaught of solar wind? Researchers in a NASA-supported lab are finding some surprising answers.

Contestants in NASA's 15th Annual Great Moonbuggy Race have crossed the finish line. And the winner is.... Read today's story to find out who crashed and who triumphed in the adventurous competition.

A crescent moon of perilous beauty is about to appear in the evening sky. The best night to look is Tuesday, April 8th, when the moon joins the Pleiades star cluster for a must-see conjunction.

Three months ago, a new solar cycle began. This week, however, the sun surprised onlookers with three big sunspots from the previous solar cycle. Strangely enough, this is perfectly normal.

NASA's Lunar Reconnaissance Orbiter will play some crafty tricks to find water on the moon, such as using starlight to see into deep, dark craters and checking the temperature with a scientific device known as "Diviner."

Two nights ago, astronomers observed a cosmic explosion so intense it was visible to the naked eye from a distance of 7.5 billion light years.

For reasons not fully understood by scientists, the weeks around the vernal equinox are prone to Northern Lights.

New research by NASA-supported scientists shows how atmospheric gravity waves, the kind we often see rippling in clouds overhead, can hit a thunderstorm and turn it into a deadly tornado.

Amateur astronomers around the world have noticed, something is happening to Saturn. The planet's rings are rapidly narrowing and, if this continues, before long they'll be just a wafer-thin line almost invisible to backyard telescopes.

To celebrate Women's History Month, an all-female team of scientists and engineers has taken control of Mars rover Spirit.

The surprises continue. Scientists studying the harvest of photos from MESSENGER's Jan. 14th flyby of Mercury have found several craters with strange dark halos and one crater with a spectacularly shiny bottom.

Imagine living on a planet where Northern Lights fill the heavens at all hours of the day. Around the clock, even in broad daylight, luminous curtains shimmer and ripple across the sky. News flash: Astronomers have discovered such a planet. Its name is Earth.

A NASA spacecraft in orbit around Mars has taken the first ever image of active avalanches near the Red Planet's north pole.

New high-resolution radar maps of the Moon's south pole reveal a fantastic land with peaks as high as Mt. McKinley and crater floors four times deeper than the Grand Canyon.

Do you know who's orbiting the moon? The answer might surprise you. Find out in today's story from Science@NASA.