Discover Earthのインスタグラム(discoverearth) - 1月5日 00時00分

Who's ever seen such a beautiful sky?
Polar stratospheric clouds (PSCs) are clouds in the winter polar stratosphere at altitudes of 15,000–25,000 m (49,000–82,000 ft). They are best observed during civil twilight, when the Sun is between 1 and 6 degrees below the horizon, as well as in winter and in more northerly latitudes.

"Experienced some of the most incredible polar stratospheric clouds I’ve ever seen in my life few days ago (also called nacreous clouds). The sun was rising so the orange glow blended with those unbelievable rainbow clouds. Polar stratospheric clouds are rare and only form in the Arctic polar region."

#discovericeland🇮🇸 with @h0rdur

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[BIHAKUEN]UVシールド(UVShield)

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