24 January 2012, 05:50 PM ET
Astronomers rank solar flares from weakest to strongest.
24 January 2012, 02:40 PM ET
Sunspots on the sun's surface are responsible for some recent major solar storms.
24 January 2012, 11:55 AM ET
The geomagnetic storm is expected to last one to two days.
24 January 2012, 10:54 AM ET
The Sun's far reaching effects on Earth's upper atmosphere were put on display on January 22, 2012 and captured by Helge Mortensen of Norway. A January 19th solar flare and ensuing Earth-directed coronal mass ejection is behind this aurora borealis.
23 January 2012, 04:40 PM ET
See amazing views of the northern lights seen by skywatchers in January 2012.
23 January 2012, 03:20 PM ET
The six residents of the International Space Station are safe from a massive solar storm erupting on the sun.
23 January 2012, 11:47 AM ET
A powerful M9-class solar flare erupted early Jan. 23 (GMT) sparking a powerful radiation storm.
23 January 2012, 09:06 AM ET
A massive sunspot released a M9-class solar flare (one step below the most powerful x-class flares) on January 23, 2012. The resulting coronal mass ejection may set off geomagnetic storms on Earth by January 24th or 25th.
21 January 2012, 08:00 AM ET
From futuristic spaceships to bubbles in space, it's been a remarkable week for space photography.
20 January 2012, 11:44 AM ET
On January 19th, 2012, the Sun produced an M3-class solar flare and the ensuing coronal mass ejection was pointed towards Earth. Fierce geomagnetic storms are possible when it reaches the planet on January 21st.
20 January 2012, 11:04 AM ET
The solar flare will arrive at Earth late Saturday (Jan. 19).
04 January 2012, 07:00 AM ET
The Solar Dynamics Observatory probe recorded video of last week's powerful solar storms.
03 January 2012, 12:14 PM ET
An active region on the Sun produced dozens of outbursts including a medium sized flare and coronal mass ejection. This time-lapse video highlights the year ending fireworks. Images captured by SDO on December 29-30, 2011.
28 December 2011, 08:22 AM ET
The sun finally woke up this year after a five-year slumber.
27 December 2011, 03:01 PM ET
Temporary radio blackouts could result as well.
22 December 2011, 02:00 PM ET
The mystery of Mercury's weak magnetic field may be solved.
19 December 2011, 03:03 PM ET
Skywatcher Yuichi Takasaka was in the right place at the right time for this stunning photo.
14 December 2011, 03:05 PM ET
Asteroids, comets, eclipses, eruptions and discoveries highlight a very active year in space. Here are some of the astronomical highlights that made 2011 a special year to peer into the cosmos.
08 December 2011, 10:56 AM ET
Intense solar storms can strip material off the surface of the moon like a sandblaster, a new study finds.
07 December 2011, 11:03 AM ET
The sun is coming out of a slumber and ramping up its activity.
06 December 2011, 02:55 PM ET
Best view yet of strange elves and sprites high in atmosphere.
05 December 2011, 02:50 PM ET
NASA's Voyager 1 spacecraft is traveling through a new region about 11 billion miles away from the sun.
05 December 2011, 06:47 AM ET
Jupiter-sized planet CoRoT-2b is routinely slammed by solar storms that are 100,000 times stronger than what we experience on Earth, decimating its atmosphere. Researchers speculate that auroras would be seen at all latitudes on the planet.
30 November 2011, 09:12 AM ET
Vibrant Northern Lights filled the night sky over Abisko National Park on November 28, 2011. Chad Blakley (www.lightsoverlapland.com) captured this stunning time-lapse video.
17 November 2011, 02:00 PM ET
The sun may not be about to enter a prolonged quiescent period, as some scientists have predicted.
15 November 2011, 01:56 PM ET
A time-lapse video that strings together photographs taken by space station astronauts shows Earth in all its glory.
15 November 2011, 11:51 AM ET
On November 14, 2011, an extremely long filament (about 466,000 miles) stemming from an eruption on the Sun snapped its tail. It was not directed towards Earth. The imagery was captured by NASA's Solar Dynamics Observatory and music by Atom Strange.
14 November 2011, 07:00 AM ET
The northern or southern lights are caused by a collision of charged particles in Earth's atmosphere.
11 November 2011, 01:12 PM ET
A solar flare this week could amp up the northern lights this weekend.
11 November 2011, 08:34 AM ET
There is absolutely no chance of a giant solar flare destroying life on Earth in 2012, NASA scientist C. Alex Young says.
11 November 2011, 06:50 AM ET
No solar flare is powerful enough to do the job.
05 November 2011, 12:22 AM ET
What was the most amazing view from space this week?
04 November 2011, 05:40 PM ET
The sunspot is 50,000 miles wide and is the largest in years on the sun.
04 November 2011, 02:45 PM ET
An X-class solar flare and and a Coronal Mass Ejection through the eyes of NASA's Solar Dynamics Observatory and STEREO spacecraft on November 3rd, 2011. One of the largest sunspots in years drives this solar activity.
03 November 2011, 01:09 PM ET
Solar flares and huge explosions called coronal mass ejections are often associated with active regions.
03 November 2011, 12:14 PM ET
Japan Space Agency astronaut Satoshi Furukawa recorded lightning, auroras and the islands of Japan at night during more than 30 hours of Earth observation through windows of the International Space Station.