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.
29 September 2009, 01:49 PM ET
28 September 2009, 03:03 PM ET
NASA's MESSENGER spacecraft is set to make a close approach to the planet Mercury, revealing new views along the way.
17 September 2009, 09:03 AM ET
Even during low points in the Sun's solar cycle, solar winds still bombard the Earth, a new study finds
02 September 2009, 09:40 AM ET
On Sept. 2, 1859, an incredible storm of charged particles sent by the sun slammed into Earth's atmosphere, overpowered it, and caused havoc on the ground.
27 August 2009, 02:08 PM ET
Study finds links between solar energy output and changes in stratosphere circulation and ocean temperature.
18 August 2009, 10:03 AM ET
Sudden bursts of energy called nanoflares heat parts of sun's atmosphere.
30 July 2009, 05:14 PM ET
Bright spot appears in Venus' clouds; cause unknown.
06 July 2009, 10:08 AM ET
After one of the longest sunspot droughts in modern times, solar activity picked up quickly over the weekend.
18 June 2009, 02:04 PM ET
New simulation models dynamics of sunspots; could help understand how they work.
17 June 2009, 05:36 PM ET
Scientists have been puzzling in recent months over the sun's lack of spots.
08 June 2009, 09:03 AM ET
Spacecraft discovers new clues to how Mercury hangs on to its atmosphere.
04 June 2009, 12:56 PM ET
A dummy astronaut packed with bone and blood cells will endure an intense radiation shower that simulates a solar flare.
02 June 2009, 09:53 AM ET
Scientists have pinpointed where an Earthbound space storm would strike when it crashed into the atmosphere.
28 May 2009, 11:49 AM ET
Large planets, like Saturn and Jupiter, could reflect activity on the Sun that we can see directly. But they also make and scatter their own X-rays. Podcast available from: chandra.harvard.edu
27 May 2009, 04:45 PM ET
The Sunrise telescope will launch by balloon sometime in June to view the sun's surface.
09 May 2009, 06:00 AM ET
If all goes well, three space missions will soon observe the Sun simultaneously.
08 May 2009, 07:48 PM ET
However, big Earth-threatening solar storms could still kick up at any time, the researchers cautioned today.
05 May 2009, 02:41 PM ET
The sun's recent lack of activity is unlikely to lead to another Little Ice Age.
23 April 2009, 05:16 PM ET
New observations of space tornadoes shed light on auroras.
14 April 2009, 02:25 PM ET
Twin STEREO spacecraft get three-dimensional view of coronal mass ejection.
09 April 2009, 02:39 PM ET
New instrument detects boundary between Earth's atmosphere and solar particles.