30 September 2011, 02:00 PM ET
Currently crossing the sun, Sunspot 1302 is one of the most active sunspot groups in years.
29 September 2011, 12:46 PM ET
The planet closest to the Sun has a magnetosphere like the Earth, but at its poles, the Sun's powerful force takes it toll by super charging sodium and oxygen particles and blasting them into space. NASA's MESSENGER probe weathers the storm.
27 September 2011, 01:24 PM ET
The forecast is based on a study of the past 9,300 years of cosmic ray and solar activity.
26 September 2011, 06:50 PM ET
Skywatchers in Europe and Asia are best positioned to see the show.
26 September 2011, 05:09 PM ET
Sunspot 1302 released a X1.9 category flare on September 24th, 2011. This has been a very active sunspot over the last few days, with multiple flares and coronal mass ejections recorded.
26 September 2011, 01:24 PM ET
Sunspot 1302 has been busy producing multiple flares and coronal mass ejections, even being detected by shortwave radio on Earth. Multiple day and view look provided by the Solar Dynamics Observatory. Audio recorded by Thomas Ashcraft in New Mexico.
25 September 2011, 08:00 AM ET
Was it the 'space chicken' nebula, Saturn's rings, a dark red moon over Chile or something else that grabbed you.
20 September 2011, 05:06 PM ET
Between 7pm ET on September 18 and 1pm ET on September 19, six large solar plasma explosions were recorded by the SOHO satellite. One of these coronal mass ejections may create some geomagnetic fireworks viewable on Earth on September 21.
17 September 2011, 06:26 AM ET
Was it the comet that made a death plunge into the sun, an intriguing new crater on Mars or something else that grabbed you.
14 September 2011, 07:00 AM ET
Eclipse season has begun for NASA's Solar Dynamics Observatory.
13 September 2011, 02:50 PM ET
See skywatcher photos of the dazzling aurora light shows.
13 September 2011, 11:38 AM ET
Observers in Canada and on the International Space Station got quite a show.
12 September 2011, 06:40 PM ET
More M- or X-class flares should be coming from sunspot 1283.
10 September 2011, 04:34 AM ET
Was it the 45th anniversary of the movie Star Trek, events in space to remember 9/11 or something else?
09 September 2011, 11:42 PM ET
A series of solar storms could charge up the northern lights displays in the high north.
08 September 2011, 03:15 PM ET
An amateur radio astronomer captured radio sounds from the Sun, specifically from sunspot 1283. The third significant flare since September 6th from this active sunspot plays as the backdrop to the celestial shortwave radio static.
08 September 2011, 02:01 PM ET
Powerful solar storms have erupted in each of the last four days.
07 September 2011, 04:28 PM ET
NASA's Solar Dynamics Observatory spacecraft captured this solar flare. The top row shows the eruption, while the bottom row shows two traces of the sun's brightness, highlighting a second outburst more than an hour later.
07 September 2011, 03:11 PM ET
About 15 percent of solar flares have a previously undetected second burst of energy.
06 September 2011, 07:50 PM ET
The sun let loose a powerful X2.1-class solar flare Tuesday, and less intense one Monday night.
26 August 2011, 03:41 PM ET
With a techniques borrowed from earthquake detection, researchers are learning to predict where sunspots will boil-up. That gives officials in charge of satellites, power grids and radio communications more warning of crippling geomagnetic storms.
24 August 2011, 04:11 PM ET
Sunspot 1271 has been changing form over the past 72 hours, possibly a pre-cursor to a M-Class solar flare that could pose a threat to Earth. Includes Solar Dynamic Observatory imagery time-lapsed from August 22-24, 2011. Editor: Steve Spaleta
21 August 2011, 06:56 AM ET
Was it the massive sun storm, vegans who could colonize Mars or something else?
18 August 2011, 04:05 PM ET
Scientists get the best-ever look at a massive sun explosion.
18 August 2011, 02:38 PM ET
A never before seen look at the path of a coronal mass ejection from the solar surface to Earth grabbed by NASA's twin Sun-studying satellites, letting scientists measure the expanding super-hot gas shot out by solar eruptions.
18 August 2011, 02:01 PM ET
Analyzing sound waves beneath the surface of the sun could help scientists detect emerging sunspot regions.
16 August 2011, 04:15 PM ET
NASA's space weather briefing begins Thursday (Aug. 18) at 2 p.m. ET.
14 August 2011, 08:08 AM ET
Was it the huge solar flare, our life in a multiverse, DNA building blocks in space or something else?
13 August 2011, 02:49 AM ET
Check out a bright solar flare, colliding galaxies, a meteor shower and a stunning view of New York.
10 August 2011, 10:07 AM ET
Solar flares are classified on a logarithmic scale according to energy levels.
09 August 2011, 05:06 PM ET
Eruptions like Tuesday's X-class flare will only become more common.
09 August 2011, 12:18 PM ET
A comprehensive look at the different classes associated with Sun flares and the impact they have on Earth. Includes footage of the most powerful flare recorded.
09 August 2011, 10:52 AM ET
The X6.9-class solar storm rocked the sun early Tuesday (Aug. 9).
09 August 2011, 10:11 AM ET
The Aug 9, 2011 eruption on the Sun that produced a X-7 class flare caused a temporary blackout of high frequency radio transmissions on the side of Earth covered in daylight. Navigation signals can be degraded in these instances.
05 August 2011, 09:39 PM ET
A solar storm may spark auroras as far south as Pennsylvania, NASA says.
05 August 2011, 12:11 PM ET
A double whammy of coronal mass ejections occurred on our star, less than 2 hours apart, on August 3rd. Solar winds may carry these super-heated particles towards Earth; a glancing blow causing auroras and possibly damaging satellites.