NASAのインスタグラム(nasagoddard) - 4月7日 22時47分

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The visible surface of the Sun is called the photosphere! It's about 60 miles deep and dark blotches called sunspots are the most common features seen in the photosphere. Photo is a Greek root word meaning "light"!

[BIHAKUEN]UVシールド(UVShield)

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