クレジット表記
Avalon / サイネットフォト
タイトル
Space junk...This European Space Agency handout graphic shows the large numbers of satellites and other space debirs surrounding the Earth. Eighty percent of all catalogued objects are in low-Earth orbit (LEO), which extends to 2000 km above the Earth's s
キーワード
Space junk...This European Space Agency handout graphic shows the large numbers of satellites and other space debirs surrounding the Earth. Eighty percent of all catalogued objects are in low-Earth orbit (LEO), which extends to 2000 km above the Earth's surface. To observe the Earth, spacecraft must orbit at such a low altitude. The spatial density of objects increases at high latitudes