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Solar phenomena are natural phenomena which occur within the atmosphere of the Sun. They take many forms, including solar wind , radio wave flux , solar flares , coronal mass ejections , [ 1 ] coronal heating and sunspots .
Post-eruptive loops in the wake of a solar flare, image taken by the TRACE satellite (photo by NASA). In solar physics, a solar particle event (SPE), also known as a solar energetic particle event or solar radiation storm, [a] [1] is a solar phenomenon which occurs when particles emitted by the Sun, mostly protons, become accelerated either in the Sun's atmosphere during a solar flare or in ...
Stellar phenomena specifically associated with the Earth's Sun. ... Pages in category "Solar phenomena" The following 82 pages are in this category, out of 82 total. ...
Two giant holes in the Sun could create impactful space weather for Earth in early February. Recent NOAA satellite images show two coronal holes, areas on the surface of the Sun with cooler plasma ...
The sun has been especially active over the last 48 hours. It's released many M-class solar flares as well as an X-class flare — the most powerful type.
But precisely how the sun generates the solar wind has remained unclear. New observations by the Solar Orbiter spacecraft may provide an answer. ... Zhukov said stellar wind is a phenomenon common ...
A sun dog (or sundog) or mock sun, also called a parhelion [1] (plural parhelia) in atmospheric science, is an atmospheric optical phenomenon that consists of a bright spot to one or both sides of the Sun. Two sun dogs often flank the Sun within a 22° halo.
Since 1978, solar irradiance has been directly measured by satellites with very good accuracy. [11]: 6 These measurements indicate that the Sun's total solar irradiance fluctuates by +-0.1% over the ~11 years of the solar cycle, but that its average value has been stable since the measurements started in 1978.