13 May 2011, 03:21 PM ET
A comet plunged into the sun this week just as a huge solar eruption exploded.
09 May 2011, 04:40 PM ET
Hot plasma currents drag old decaying sunspots into the Sun interior, where they are re-animated by the magnetic dynamo and brought back up to the surface for the next cycle of solar activity.
02 May 2011, 04:56 PM ET
The solar wind impacting the Earth on the May 1, 2011 erupted in a magnificent display of colorful auroras.
02 May 2011, 10:03 AM ET
Rotating sunspots that twist the sun's magnetic field triggered a powerful X-class solar flare.
29 April 2011, 04:25 PM ET
It may be decades before humanity sets foot on Mars, but we're only five years away from sampling space beyond our solar system for the first time.
29 April 2011, 04:24 PM ET
Amplified hiss-like radio noise generated by electrons that traveled along magnetic field lines from Enceladus to an aurora on Saturn were captured by NASA's Cassini spacecraft.
29 April 2011, 04:24 PM ET
Here are five facts about NASA's twin Voyager 1 and 2 spacecraft, which are set to leave our solar system by 2016 or so.
20 April 2011, 12:48 PM ET
Saturn's icy moon Enceladus creates aurora glow on its parent planet.
18 April 2011, 03:38 PM ET
Studying radio emissions from auroras of Jupiter-like planets could be another technique for detecting exoplanets.
18 April 2011, 08:46 AM ET
These videos show two so-called "quiescent prominences," sheets of gas that hang in the sun's outer atmosphere.
15 April 2011, 04:14 PM ET
After spending three years in a deep sleep of historic proportions, the sun is finally starting to wake up.
13 April 2011, 06:00 AM ET
When powerful sun storms set off dazzling auroras in March, photographer Torje Sorgjerd was ready.
13 April 2011, 04:40 AM ET
See amazing images of auroras taken by skywatchers.
07 April 2011, 05:07 PM ET
In March 2011, photographer Terje Sorgjerd spent a week filming a dazzling display of northern lights in Norway, near the Russian border.
07 April 2011, 02:00 PM ET
The vortex at Venus' south pole can look like a giant 'S' or number '8.'
24 March 2011, 07:08 AM ET
The sun unleashed a plasma tentacle in a March 19 eruption and solar prominence.
23 March 2011, 05:22 PM ET
NASA’s Solar Dynamics Observatory captured this nicely rounded sun eruption from March 19, 2011 as the prominence became unstable and erupted into space with a distinct twisting motion.
23 March 2011, 11:33 AM ET
Saturn's odd radio emissions likely show the sun's shifting influence on the giant planet.
10 March 2011, 12:00 PM ET
NASA's 34-year-old Voyager 1 probe is performing new tricks at the solar system's edge.
10 March 2011, 07:55 AM ET
A powerful X1.5-class solar flare could make auroras visible in northern U.S. and Canada.
02 March 2011, 05:21 PM ET
The solar wind is creating spectacular auroras this week.
02 March 2011, 01:01 PM ET
Astronomers use computer simulations to figure out what caused the drought.
26 February 2011, 12:24 AM ET
The sun unleashed a dazzling solar flare Feb. 24 that NASA called a 'monster.'
19 February 2011, 06:03 PM ET
There is work to be done to make sure Earth is prepared for the next solar storm.
18 February 2011, 07:43 PM ET
Dramatic as it was, the huge solar eruption on Valentine's Day didn't send astronauts aboard the International Space Station scurrying for cover. In fact, the coronal mass ejection probably helped lower their radiation dose.
17 February 2011, 05:08 PM ET
The sun unleashed its most powerful eruption in more than four years this week, but it could have been a lot worse, experts say. The sun's space weather cycle have serious impacts on Earth.
17 February 2011, 11:52 AM ET
A whopper of a solar flare that fired up earlier this week is wreaking havoc on radio communications and power grids on Earth, and could spark exceptional auroras soon.
15 February 2011, 12:17 PM ET
The sun released its strongest solar flare in four years last night (Feb. 14).
14 February 2011, 04:03 PM ET
A strong solar flare that erupted yesterday may amplify aurora displays tonight.
11 February 2011, 05:02 PM ET
New images show dramatic auroras – flares of ultraviolet light – streaming from the planet Jupiter.
11 February 2011, 01:57 PM ET
A look at NASA's Solar Dynamics Observatory a year after its launch.
09 February 2011, 08:48 AM ET
The huge clouds of material erupting from the sun may share at least one feature with the fluffy white clouds scudding through Earth's skies — ripples of instability along one flank.
01 February 2011, 01:37 PM ET
A flotilla of NASA space probes has tracked the origin of the energetic particles in Earth's magnetic atmosphere, finding they gain extra energy far from the "substorms" that spawn them.
28 January 2011, 02:14 PM ET
The sun unleashed two powerful solar eruptions Jan. 28 in a spectacular double blast.
15 December 2010, 01:43 PM ET
Scientists want to understand why these light shows appear to slow down satellites orbiting the Earth.
14 December 2010, 06:06 PM ET
Violent explosions on the sun can be global events, interconnected by magnetism over vast distances, according to a new study.