30 January 2012, 05:54 PM ET
The sun's violent activity expands Earth's atmosphere, which increases the rate that space junk falls from orbit.
30 January 2012, 12:47 PM ET
The Radiation Assessment Detector (RAD) aboard the Curiosity rover is collecting data while en route to the Mars. This will give important information of the effects of radiation from events such as solar storms on spacecraft and their contents
30 January 2012, 12:02 PM ET
A huge eruption of radiation from the sun was measured in space by NASA's MSL Curiosity rover.
30 January 2012, 07:00 AM ET
Dangerous electrons from nearby radiation belts are more likely to escape into space than spiral down toward Earth.
28 January 2012, 04:48 AM ET
Spectacular space images filled the last week of January, including one stunning photo from NASA's newest Earth-watching satellite and a brilliant image of a shooting star soaring over castle ruins.
27 January 2012, 03:31 PM ET
The same sunspot to unleash a M.9 flare just a few days ago erupted again with the strongest of flares, X type, on January 27, 2012. Fortunately, the Earth was spared the full brunt of the solar shockwave, but a radiation storm may still be imminent.
27 January 2012, 03:18 PM ET
An X-class flare, the most powerful type of solar storm, erupted from the sun today.
27 January 2012, 09:35 AM ET
A huge solar flare triggered the strongest radiation storm since 2005.
25 January 2012, 03:22 PM ET
You should always wear sunscreen, but there's no need to wear more than normal during a solar flare.
25 January 2012, 02:18 PM ET
Sophisticated models help scientists predict the nature of solar storms that could affect Earth.
25 January 2012, 09:53 AM ET
The auroras amazed skywatchers in Sweden, Finland and elsewhere Tuesday night (Jan. 24).
25 January 2012, 08:16 AM ET
Lights Over Lapland photographer Chad Blakley captured this amazing view of the aurora borealis in Sweden on January 24th, 2012. The January 23rd solar flare and ensuing coronal mass ejection are the 'lighting engineers' of this incredible display.
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.