30 May 2013, 01:46 PM ET
Astronauts on long interplanetary trips will face at least two kinds of radiation hazards. The Mars Science Lab’s Radiation Assessment Detector (RAD) has quantified the risk. Crews could get much more than the current accepted career dose.
29 May 2013, 10:33 AM ET
Massive 'hot Jupiters', gas giants that orbit close to their stars, are usually tidally locked, which means they have a permanent day side and permanent night side. The extreme differences in temperatures on the two sides drive powerful storms.
24 May 2013, 12:15 PM ET
An M5-class flare erupted on the Sun on May 22nd, 2013 and magnetic fields worked their magic with super-heated plasma. The flare is seen in a combination of extreme ultraviolet light (at 171 and 304 Angstroms) by NASA's Solar Dynamics Observatory.
24 May 2013, 07:00 AM ET
If the sun doesn't get us, then the nuclear air bursts will.
23 May 2013, 05:47 PM ET
The four most spectacular night-sky sights may all be visible soon.
21 May 2013, 11:03 AM ET
Photographer Thomas Kast (vimeo.com/66083099) imaged the aurora borealis from September 2012 to March 2013. Different shooting locations include the frozen Baltic Sea, Lapland and Oulu in Finland.
21 May 2013, 07:00 AM ET
A large coronal mass ejection from the active sun could affect entire continents, scientists say.
17 May 2013, 04:30 PM ET
A new video from a skywatcher in northern Michigan shows amazing views of the auroras and other cosmic wonders over the course of a year.
17 May 2013, 01:41 PM ET
The eruption shouldn't pose a threat to Earth but may supercharge northern lights displays.
17 May 2013, 11:05 AM ET
After a day of rest, active region 1748 unleashed class-M1.3 and M3.2 flares on May 16th and 17th, 2013. This same storm blasted 4 X-class flares between May 13 and 15.
15 May 2013, 11:19 AM ET
NASA's Solar Dynamics Observatory has its eyes set on the sunspot that delivered X-Class flares from May 13-15, 2013. Close-Up views reveals x-ray flares interacting with the magnetic loops emitted from the Sunspot.
15 May 2013, 09:09 AM ET
The X1.2 solar flare was the fourth X-class flare in two days from the sunspot AR1748.
14 May 2013, 02:59 PM ET
AR1748 should be lined up with our planet by the weekend.
14 May 2013, 10:06 AM ET
The Sun erupted with 3 X-Class Flares (X1.7, X2.7, X3.2) during a one day period starting May 13th 2013. It was crackling with more flares before & after the most powerful ones. Can you determine how many flares recently named sunspot AR1748 tallied?
14 May 2013, 06:59 AM ET
The giant solar flare late Monday (May 13), the strongest yet of 2013, is the the third major sun storm in 24 hours.
13 May 2013, 02:34 PM ET
A brief rundown on solar flares, their classification and their potential impacts on Earth.
13 May 2013, 02:07 PM ET
The first x-class flare (X1.7) of year was soon followed by a second more powerful X2.8-class flare, separated by about 14 hours on May 13th, 2013. NASA's Solar Dynamics Observatory had its eyes fixed on the show.
13 May 2013, 01:10 PM ET
The sun's unceasing activity affects our planet beyond providing obvious light and heat.
13 May 2013, 12:48 PM ET
NASA's Solar Dynamics Observatory captured an X-1.7-class flare on May 13th, 2013 and STEREO-B recorded the ensuing coronal mass ejection. -- As an added bonus, a massive prominence erupted from near the southwestern limb of the Sun.
13 May 2013, 12:29 PM ET
The sun is firing off its strongest solar flares of the year as it edges closer to peak sun storm season.
13 May 2013, 10:07 AM ET
An X1.7-class solar flare erupted on the eastern limb of the Sun, as seen from Earth, on May 13th, 2013. It is not Earth directed but the resulting coronal mass ejects is on course to hit NASA's Epoxi and Spitzer spacecraft on May 15th.
13 May 2013, 06:29 AM ET
The sun unleashed a Mother's Day solar flare on May 12, sparking an X1.7-class sun eruption.
12 May 2013, 03:25 PM ET
See photos from NASA's space weather headquarters at the Goddard Flight Center in Greenbelt, Md.
10 May 2013, 02:30 PM ET
The eastern limb of the Sun, as seen from Earth, is very active. M3.9-Class and M1.9-Class flares erupted within a few hours of each other on May 10th, 2013. NASA's Solar Dynamics Observatory was on hand to catch the fireworks.
10 May 2013, 11:05 AM ET
Photographer Shawn Malone (vimeo.com/65504232) captured auroras, stars, comet Pan-STARRS, lake views and city views from parks, forest and trails all over northern Michigan. She edited a highlight reel from a years worth of photography.
04 May 2013, 10:07 AM ET
The sun fired off a dazzling solar eruption on Friday, May 3, after days of increased activity.
01 May 2013, 05:26 PM ET
The video by NASA's Solar Dynamics Observatory reveals a colossal plasma wave on the sun.
30 April 2013, 11:27 AM ET
A C3.0-class solar flare erupted from the Sun on April 29th, 2013. Most of the ejected plasma did not have the velocity to break free of the Sun. The event was captured by NASA's Solar Dynamics Observatory.
26 April 2013, 12:12 PM ET
The video offers an unprecedented glimpse of the sun's activity as it waxes and wanes.
26 April 2013, 07:40 AM ET
NASA's Messenger and Stereo-A space probes were not affected by three back-to-back solar storms, scientists say.
24 April 2013, 05:59 PM ET
The three solar eruptions may deal a glancing blow to NASA's Messenger spacecraft at Mercury.
17 April 2013, 06:10 PM ET
Check out views of the sun from the online Slooh Space Camera in a webcast Thursday.
11 April 2013, 11:42 AM ET
The powerful solar flare erupted from the sun at 3:16 a.m. ET on Thursday, April 11.
11 April 2013, 10:16 AM ET
Astrophotographer JP Brahic captured this beautiful image of sunspot AR 1711 from France on April 5.
11 April 2013, 09:12 AM ET
An M6-class flare erupted from sunspot AR1719 on Aprill 11th, 2013. The coronal mass ejection will will probably reach Earth's magnetic field on April 12th or 13th. NASA's Solar Dynamics Observatory captured the fireworks.
10 April 2013, 10:19 AM ET
The European Space Agency opened a new space weather center last week in Brussels to keep tabs on solar storms.