What is Space Junk? (Grades 5-8) (OTM2131) (eLesson Plan)Lapierre, Krystal
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D. It refers to all kinds of objects that have been left behind in space. 相关知识点: 试题来源: 解析 选D 细节理解题。从第二段第一句判断,space junk指人类在太空活动中遗留在太空的所有的物体,即“太空垃圾”。反馈 收藏
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The space junk in orbit becomes more hand -in -hand with the growth of the space industry 7on Earth.A group of international researchers wrote an article and showed people the growing problem of space junk.They called for a treaty 8 to “help protect Earth ’s orbit ”before it becomes ...
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A special NASA satellite called theLong Duration Exposure Facility(LDEF) was put in orbit to study the long-term effects of collisions with space junk. The space shuttle Challenger deployed LDEF in April 1984, and the space shuttle Columbia retrieved it in January 1990. Over its nearly six-...
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C.Space junk is badly needed to be cleaned up.D.However, that doesn’t mean it’s not a problem.E.Space junk in orbit is becoming more and more recently.F.There also needs to be efforts to reduce the creation of more space junk.G.There are about 2,000 live satellites and 3,000 ...
On topof all the old broken-down satellite bits, some orbital debris is natural, such as meteorites the size ofsand grains and larger.Where does it all go? Does it just stay up there orbiting around in space forever? Can someone goand get it? Does it crash into other space junk? How...