1. sunspot
Wikipedia definition
2. SunspotSunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They are caused by intense magnetic activity, which inhibits convection by an effect comparable to the eddy current brake, forming areas of reduced surface temperature. Like magnets, they also have two poles.
Read “Sunspot” on English Wikipedia
Read “太陽黒点” on Japanese Wikipedia
Read “Sunspot” on DBpedia


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