22 September 2014, 11:25 AM ET
A solar flare is a light-speed traveling burst of x-rays and energy, while a coronal mass ejection (CME) is a giant cloud of particles emitted from the Sun. Both can affect the Earth in different ways and sometimes they happen together.
15 September 2014, 05:28 PM ET
Back-to-back eruptions on the sun sparked a geomagnetic storm last week, which generated dazzling auroras over the northern latitudes.
13 September 2014, 11:19 AM ET
Chad Blakley (http://lightsoverlapland.com) captured a vibrant display of Northern Lights over Abisko National Park in Sweden on Sept. 12, 2014. They were generated by a KP-7 geomagnetic storm that hit Earth as a result of two coronal mass ejections.
12 September 2014, 01:03 PM ET
Skywatchers on the ground are already catching sight of some amazing looking auroras produced by solar material blown out from the sun during two major eruptions this week.
12 September 2014, 06:32 AM ET
Two waves of solar material blown out by powerful sun eruptions n this week are hitting the Earth now, and could amplify the aurora displays for observers in northern regions.
11 September 2014, 04:36 PM ET
Powerful solar flares from the sun this week may amplify the northern lights displays over parts of the northern United States through the weekend, space weather scientists say.
11 September 2014, 04:17 PM ET
On Sept. 10, 2014, the sun unleashed a massive X1.6-class solar flare aimed directly at Earth. Take a look at amazing photos of the solar storm and its effects on Earth in this Space.com gallery.
11 September 2014, 07:00 AM ET
The sun fired off strong flares Tuesday and Wednesday from a sunspot known as Active Region 2158, which will be the focus of a free webcast hosted today at 1 p.m. EDT by the online Slooh Community Observatory. Watch it here on Space.com.
10 September 2014, 05:24 PM ET
The sun unleashed an X-class solar flare — the most powerful type — at 1:45 p.m. EDT today from an Earth-facing sunspot known as Active Region 2158. The flare poses no danger to anyone here on Earth, and orbiting astronauts are safe as well.
03 September 2014, 12:44 PM ET
A NASA satellite watched as a huge filament of plasma that had been creeping across the face of the sun erupted yesterday (Sept. 2).
26 August 2014, 02:52 PM ET
The sun kicked off this week with an explosive solar flare that, while not aimed directly at Earth, may be a hotspot to watch over the next few days.
25 August 2014, 03:40 PM ET
Expedition 40 astronaut Alexander Gerst said "We flew right through a massive aurora after last week's solar mass ejection." The space station maintains a altitude of between 205 and 270 miles above Earth.
23 August 2014, 08:20 AM ET
The northern lights illuminated Arctic skies earlier this week in a stunning display that could even be appreciated by astronauts living on the International Space Station.
22 August 2014, 07:57 PM ET
Sunspot AR2149 erupted with an M3-class flare on August 21st, 2014. NASA's Solar Dynamics Observatory captured the fireworks.
13 August 2014, 11:00 AM ET
Small 'nanoflares' erupting from the sun might be the key to unlocking a cosmic mystery, according to a new study.
29 July 2014, 11:30 AM ET
If a huge solar eruption in 2012 had hit the Earth, the effects would have been so devastating that we'd still be recovering two years later, scientists working on several new studies conclude.
08 July 2014, 03:38 PM ET
An M6-class flare erupted from sunspot AR2113 on July 8th, 2014. NASA's Solar Dynamics Observatory captured the fireworks in multiple wavelengths.
24 June 2014, 02:36 PM ET
The Big Bear Solar Observatory has delivered high definition views of a sunspot. The data will be used to unravel mysteries presented by these dark and concentrated magnetic fields.
19 June 2014, 07:29 AM ET
The sun is supposed to be at the height of its 11-year active cycle, but for the most part things have been pretty quiet.
11 June 2014, 10:06 AM ET
Sunspot AR2087 had already popped two X-class Flares on June 10, 2014 when, on June 11th, it erupted with M-5 and X-1 Flares back to back. The Sunlit side of the Earth may face some HF radio blackouts. FULL STORY: http://goo.gl/nJfcV1
11 June 2014, 09:54 AM ET
The sun is hitting its stride. Earth's closest star shot off yet another powerful solar flare today (June 11) after producing a pair of major solar storms Tuesday (June 10).
10 June 2014, 12:33 PM ET
Scientist have labeled it as a "mini-max", due to the low number of sunspots at the cycle's peak. Earth is not out of the woods yet though, the tail end of solar cycles tend to harbor the strongest flares and eruptions.
10 June 2014, 10:30 AM ET
The sun unleashed two massive solar flares Tuesday (June 10), both of them reaching X-class levels, the biggest storms on the sun. See video of the solar flares here.
10 June 2014, 10:17 AM ET
Sunspot AR2087 gave NASA's Solar Dynamics Observatory a show on June 10th, 2014 with back to back X2.2 and X1.5 solar flares. NOAA cautioned against a wide area blackout of HF radio communications. FULL STORY: http://goo.gl/q0tLYF
06 June 2014, 10:37 AM ET
A massive formation on the sun made of super-hot magnetic plasma erupted this week in an explosive solar storm captured on video by NASA spacecraft.
22 May 2014, 12:26 AM ET
Astronomers using the NASA/ESA Hubble Space Telescope have captured the images in this amazing space wallpaper showing the dancing auroral lights at Saturn’s north pole.
20 May 2014, 06:00 AM ET
Scientists have caught a glimpse of the processes that lead to the formation of solar flares and the associated space weather.
15 May 2014, 02:38 PM ET
A new study finds in an increase in lightning strikes after large solar winds. The findings suggest that particles from the sun may interact with the atmosphere to make lightning more likely.
09 May 2014, 05:17 PM ET
A NASA spacecraft has made a surprising find on the surface of the sun: a square-shaped 'hole' in the star's outer atmosphere. You can watch the video here.
09 May 2014, 06:37 AM ET
Four spacecraft and one ground-based observatory recorded the eruption of a powerful X-class solar flare on March 29, making it the best-observed such event in history, NASA officials said.
08 May 2014, 01:02 PM ET
On March 29, 2014, an X-class flare erupted from the right side of the sun and vaulted into history as the best-observed flare of all time. See the photos here.
07 May 2014, 12:36 PM ET
NASA's SDO, IRIS and RHESSI spacecrafts, along with JAXA's Hinode had their imagers pointed at the sunspot that erupted with an x-class flare on March 29th, 2014. - Rippled Earth's Magnetic Field: http://goo.gl/Kb1JHa
02 May 2014, 07:01 AM ET
NASA's Solar Dynamics Observatory probe watched the dark-hued twister churn and ultimately erupt over the course of April 29-30. Mission scientists used the spacecraft's imagery to create an 18-second-long video of the dramatic solar tornado.
30 April 2014, 02:44 PM ET
The International Sun-Earth Explorer Cometary Explorer (ISEE-3 / ICE) – launched in 1978 – makes its closest approach to Earth in August 2014.
25 April 2014, 06:47 AM ET
The sun erupted with a massive solar flare late Thursday (April 24), triggering a temporary communications blackout on some parts of Earth. See video of the X1.3 solar flare here.
16 April 2014, 05:00 PM ET
Auroras dance, the Milky Way dazzles and lightning sparks in the night sky over some of the most rugged and beautiful terrain South Dakota, Wyoming and Utah have to offer as seen in this magnificent new time-lapse film.