07 May 2010, 09:28 AM ET
A strong geomagnetic storm set off a dazzling aurora display this week, and it could happen again Saturday.
03 May 2010, 01:40 PM ET
The out-of-control satellite Galaxy 15 is posing a risk to other nearby communications satellites as it wanders from its former orbit.
29 April 2010, 05:44 PM ET
A massive blizzard is raging on Saturn a storm so large and fierce NASA astronomers and amateur skywatchers can see it from Earth.
28 April 2010, 12:28 PM ET
NASA's new Solar Dynamics Observatory observed a massive eruption on the sun--one of the biggest in years. The second loop is a color-coded temperature movie of the eruption. Red and oranges are, blues and greens are hot.
27 April 2010, 08:08 AM ET
Solar winds that flow over natural obstructions on the moon may create electrically charged polar lunar craters, according to new calculations from NASA.
23 April 2010, 03:34 AM ET
A prominence of gas leaps off the surface of the sun in a new image from NASA's powerful Solar Dynamics Observatory.
22 April 2010, 08:18 AM ET
Because it can simultaneously monitor several wavelengths of the sun's light and quickly grab very hi-res images, the new SDO is sparking a revolution in our understanding of the Sun.
21 April 2010, 02:33 PM ET
First photos from NASA's Solar Dynamics Observatory were released today, revealing new details of the sun.
14 April 2010, 07:02 PM ET
Saturn ice moon Enceladus creates ripples and bubbles in plasma surrounding giant planet.
13 April 2010, 12:45 PM ET
The world's first weather satellite, TIROS-1, launched 50 years ago,and changed the world.
06 April 2010, 01:48 PM ET
NASA is investing in a new space weather forecast system that could give days of warning for space storms headed for Mars and Earth.
06 April 2010, 11:19 AM ET
A stunning new photo shows the International Space Station flying through a dazzling aurora display above Earth.
18 March 2010, 02:13 PM ET
Six years of Cassini observations shed light on Saturn's rings, magnetic shield.
12 March 2010, 11:45 AM ET
Killer electrons generated in Earth's magnetic shield when solar storms hit.
05 March 2010, 07:22 AM ET
Early Earth's magnetic field weaker than today, likely led to water loss from atmosphere, bigger auroras.
27 February 2010, 06:08 AM ET
Jupiter, the largest planet in the solar system, is about to welcome a robotic visitor in the form of NASA’s New Horizons probe on Wednesday.
11 February 2010, 10:11 AM ET
Hubble films Saturn edge-on during equinox, sees auroras over poles.
11 February 2010, 05:07 AM ET
Hubble captured Saturn's equinox in 2009, including auroral displays over both the planet's poles.
09 February 2010, 05:37 AM ET
Science has only just begun to understand how cyclical changes in the Sun effect Earth's weather and climate. But the more technological human society grows, the more vulnerable we may become.
09 February 2010, 05:36 AM ET
Hot fusion fires and strong magnetic fields shape massive solar outbursts. Watch how this stellar instrument tunes itself up to serenade its planets with energy.
09 February 2010, 05:35 AM ET
Venus is a virtual twin of Earth in size, mass and basic composition. So why is its surface a hellish high-temperature desert? Turns out the Sun may have dealt this planet a death blow.
09 February 2010, 05:34 AM ET
It should have been all quiet on the Sun. But an unexpected series of solar events put Earth in the cross-hairs of a major geomagnetic storm.
07 February 2010, 10:15 AM ET
A new group of sunspots has produced moderate (M-class) solar flares, but forecasters say it could unleash a large (X-class) flare.
28 January 2010, 05:15 AM ET
NASA's Solar Dynamics Observatory will looks for sunspots and solar flares with better resolution than even HDTV.
21 January 2010, 05:19 PM ET
NASA plans to launch a new spacecraft, the Solar Dynamics Observatory (SDO), to take the most detailed observations ever of the sun and its complex weather.
17 December 2009, 03:28 PM ET
Cameras over poles spot auroras colliding for first time.
17 December 2009, 09:44 AM ET
When sun is at minimum in solar cycle, outer layers of Earth's atmosphere cool substantially.
10 December 2009, 11:28 AM ET
A spectacular spiral light show in the sky above Norway Wednesday was caused by a Russian missile that failed just after launch, according to Russia’s defense ministry.
02 December 2009, 07:21 AM ET
The planet is totally lopsided. Why? Astonishing evidence of past cataclysms explains why Earth seems not to have living neighbors.
25 November 2009, 11:18 AM ET
Images, movies from STEREO spacecraft confirm reality of solar tsunamis.
24 November 2009, 03:11 PM ET
As on Earth, electrical fields above Saturn interact with atmospheric chemicals to produce shimmering lights above the polar regions.
24 November 2009, 09:35 AM ET
The first video of auroras above the Saturn reveals the tallest
known "northern lights" in the solar system, flickering in shape and
24 November 2009, 09:08 AM ET
New solar observatory to probe sun's inner and outer workings.
18 November 2009, 01:55 PM ET
An exploding space rock lit up the skies over parts of the western United States.
17 November 2009, 09:25 AM ET
SUNRISE telescope images sun's surface from Earth's stratosphere.
30 September 2009, 09:50 AM ET
A NASA spacecraft that completed its third and final flyby of the planet Mercury yesterday, snapping new pictures of the innermost planet, had a small data hiccup that has delayed release of the images.