Jamie Carter is a freelance journalist and regular Live Science contributor based in Cardiff, U.K. He is the author of A Stargazing Program For Beginners and lectures on astronomy and the natural world. Jamie regularly writes for Space.com, TechRadar.com, Forbes Science, BBC Wildlife magazine and Scientific American, and many others.
When it was shared: Dec. 10, 2024
The sun's magnetic activity waxes and wanes over 11 years. The current solar cycle began in 2019 with solar minimum and reached solar maximum in mid-October. Scientists count the number of sunspots — cooler solar regions that are caused by a concentration of magnetic-field lines — to determine and predict the progress of the solar cycle. However, some solar science can be performed only during a total solar eclipse.
The sun's corona is the hottest and outermost layer of the star's atmosphere; it extends millions of miles into space. However, its intricate structures are overwhelmed by the sun's photosphere — its bright surface — and can be seen from Earth only during the totality phase of a total solar eclipse, when the sun is completely blocked by the moon from our perspective on Earth.
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