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Active region
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In solar physics, an active region is a temporary feature in the Sun's atmosphere characterized by a strong and complex magnetic field. Active regions are often associated with sunspots and are common
An active region seen in visible light showing a group of sunspots.
An active region seen in visible light showing a group of sunspots.
Sunspot
Videos
Sunspots are temporary spots on the Sun's surface that are darker than the surrounding area. They are regions of reduced surface temperature caused by concentrations of magnetic flux that inhibit conv
Active region
…region is a temporary feature in the Sun's atmosphere characterized by a strong and complex magnetic field. Active regions are often associated with sunspots and are commonly the source of violent eruptions such as coronal mass ejections and solar flares. The number and location of active regions on the solar…
The Swedish 1-m Solar Telescope at Roque de los Muchachos Observatory on La Palma in the Canary Islands
The Swedish 1-m Solar Telescope at Roque de los Muchachos Observatory on La Palma in the Canary Islands
NASA's SDO Observes Largest Sunspot of the Solar Cycle
NASA's SDO Observes Largest Sunspot of the Solar Cycle
Sunspots 1302 Sep 2011 by NASA
Sunspots 1302 Sep 2011 by NASA
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172197main NASA Flare Gband lg withouttext