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.
01 August 2011, 08:28 PM ET
Merely a bug in the face of our solar mammoth, the international space station was captured through the eyes of telescopes using a Canon Digital Rebel XT for still photography and a Phillips ToUcam Pro II for video. Snapped in Minnesota on 7/30/2011.
01 August 2011, 06:12 PM ET
A powerful M9-class solar flare erupted from the sun on July 29.
01 August 2011, 11:00 AM ET
See recent images of the sun taken by the Solar Dynamics Observatory and the two STEREO spacecraft.
28 July 2011, 02:38 PM ET
The solar twister was nearly 150,000 kilometers tall.
27 July 2011, 01:01 PM ET
Magnetic waves may be the secret to the sun's ultra-hot corona.
25 July 2011, 10:01 AM ET
A look underneath the Sun's magnetic plasma in filtered light shows the correlation between bright solar active regions and their sunspot sources.
20 July 2011, 03:49 PM ET
Space Shuttle Discovery captured these amazing night into day images, including an Aurora Borealis, while docked to the International Space Station in April 2010.
19 July 2011, 03:34 PM ET
The twin Artemis probes will study the moon from orbit for the next seven to 10 years.
18 July 2011, 02:55 PM ET
Over a 2 hour period the Sun released a massive strand of plasma that split and twisted into what resembles a dragon before falling back to the surface. Captured by the Solar Dynamics Observatory on July 12, 2011.
14 July 2011, 01:03 PM ET
Here's a blow-by-blow of one of the most powerful solar storms in recent history.
13 July 2011, 12:38 PM ET
Eleven years ago this week, one of the worst storms on record raged on the sun.
26 June 2011, 12:49 AM ET
Choose your favorite space story from the last week.
24 June 2011, 01:53 PM ET
Skywatchers at high northern latitudes may see some supercharged auroras, NASA says.
24 June 2011, 01:10 PM ET
Plasma from solar flares or coronal mass ejections travel along solar wind to ultimately produce aurora's in Earth's polar regions. This visually stunning explanatory video takes you on a journey from Sun's interior to the Earth's upper atmosphere.
23 June 2011, 02:56 PM ET
In 2004, the NASA probe's parachute malfunctioned and it crash-landed in Utah. The probe was sent about 900,000 miles from Earth to collect bits of solar wind and return them for study - some samples were salvaged.
23 June 2011, 02:01 PM ET
Earth and the other rocky planets aren't made out of the solar system's original starting material.
22 June 2011, 06:40 PM ET
Researchers are working on ways to predict and track the next big solar eruption.
21 June 2011, 02:19 PM ET
A moderate solar flare ejected in the relative direction of our home planet on June 21, 2011. All indications are that it's not particularly strong but could set off polar geomagnetic storms when it reaches Earth on June 23rd.
20 June 2011, 05:44 PM ET
Tongues of 60,000 degree plasma flick out and curl back into the Sun in this 13 hour time-lapse movie of extreme ultra-violet light. Hot licks in the soundtrack provided by Atom Strange.
16 June 2011, 06:00 AM ET
Could a giant magnetic rope that produces strong electric current be the cause of solar storms?
15 June 2011, 03:02 PM ET
Solar physicists have a keen interest in studying changes in the sun's activity.
14 June 2011, 04:19 PM ET
Solar activity dropped dramatically in 2008, and this historic lull caused a similar decrease in magnetic effects on Earth — with an eight-month lag.
14 June 2011, 03:50 PM ET
The results of three new studies point to a slowdown of solar activity even as the current solar cycle ramps up.
10 June 2011, 05:00 PM ET
Astronomers are set to reveal a "major result" about the sunspot cycle on Tuesday (June 14).
09 June 2011, 12:34 PM ET
A unique event on the sun this week ejected loads of material into space that then rained back down on the solar surface.
08 June 2011, 05:14 PM ET
A recent and powerful solar storm could trigger luminous aurora displays for some lucky skywatchers.
07 June 2011, 02:21 PM ET
See video of the spectacular June 7 solar flare and sun eruption.
31 May 2011, 05:21 PM ET
For the second time in 10 days, a comet has plunged into the sun just after a huge solar eruption.
26 May 2011, 06:23 AM ET
Spaceships and satellites can encounter stormy "seas" of debris, radiation and electromagnetic fields. Europe's space situation awareness program is anchoring new technologies and procedures to keep spacecraft afloat.