Is the sun trying to send a message? A pair of giant filaments on the face of the sun have formed what appears to be an enormous arrow pointing to the right. If straightened out, each filament would be about as long as the ...
Space Exploration
May 29, 2015
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Rain is a common phenomenon on Earth. There is a similar phenomenon on the Sun, called coronal rain. It is related to the coronal heating and magnetic field, and plays a fundamental role in the mass cycle between the hot, ...
Astronomy
Apr 22, 2021
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A third and fourth flare have erupted from sunspot 1283. The third came on September 7 at 6:36 PM ET, and was categorized as an X1.8 by the GOES spacecraft, making it the second X-class flare within 24 hours.
Space Exploration
Sep 8, 2011
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An active region of the sun just rotating into the view of NASA's Solar Dynamics Observatory gives a profile view of coronal loops over about a two-day period, from Feb. 8-10, 2014.
Space Exploration
Feb 19, 2014
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0
The first images from the Solar Ultraviolet Imager (SUVI) instrument aboard the National Oceanic and Atmospheric Administration's GOES-16 satellite capture a large coronal hole on the sun.
Space Exploration
Apr 4, 2017
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9
In early September 1859, the Northern Lights could suddenly be seen as far south as the Caribbean. The cause was a geomagnetic solar storm—specifically a coronal mass ejection, now dubbed the Carrington Event, after the ...
Planetary Sciences
Nov 23, 2022
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On Nov. 9, 2015, NASA's Solar and Terrestrial Relations Observatory Ahead, or STEREO-A, once again began transmitting data at its full rate. For the previous year, STEREO-A was transmitting only a weak signal—or occasionally ...
Space Exploration
Nov 19, 2015
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(Phys.org)—On Nov. 13, 2012, the sun emitted a mid-level solar flare, peaking at 9:04 p.m. EST.
Space Exploration
Nov 13, 2012
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0
Geomagnetic activity caused by our star recently created a stir in the skies over Iceland, resulting in the seeming electrification of the night, as captured here by photographer Ollie Taylor.
Space Exploration
Feb 22, 2019
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36
The Solar Ultraviolet Imager, or SUVI, onboard NOAA's GOES-18 satellite, which launched on March 1, 2022, began observing the sun on June 24, 2022. SUVI monitors the sun in the extreme ultraviolet portion of the electromagnetic ...
Astronomy
Jul 21, 2022
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