NASAのインスタグラム(nasa) - 2月7日 07時32分

Darker, cooler areas on the Sun – known as sunspots – have been mostly absent for almost two weeks, as of Feb. 1. A single, tiny one appeared on Jan. 31, but even that is hard to see in this rotating view from our Solar Dynamics Observatory. The video shows a rotating sun in filtered light for the past week, but it is even hard to tell the sun is rotating since there are just about no features.
This spotless period is a prelude to the approaching period of solar minimum next year, when the Sun’s activity will be at the low end of its 11-year cycle.
Credit: NASA/SDO
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