NASAのインスタグラム(nasa) - 7月1日 02時25分
When an asteroid or comet comes close to Earth we call it a near-Earth object. But how close is close? How do we keep track of them? What can we do to mitigate our risk? We have the answers.
Here’s what you need to know about near-Earth objects this #AsteroidDay!
#SolarSystem #NASA #Asteroid #FunFact #NowYouKnow #Science
[BIHAKUEN]UVシールド(UVShield)
>> 飲む日焼け止め!「UVシールド」を購入する
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