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you are taking the following test: |
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Grade: 3, Subject: LanguageArts, Topic:
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| See the following text/image to answer questions 1 through 5 |
Outer Space
Outer space within the solar system is called interplanetary space. The vacuum of outer space is not really empty. Outer space is sparsely filled with several dozen types of organic molecules discovered to date by microwave spectroscopy. There is also gas, plasma and dust, and small meteors and material left over from previous manned and unmanned launches. These left over materials are a potential hazard to spacecraft. Some of this debris re-enters the atmosphere periodically.
The absence of air makes outer space ideal location for astronomy. The spectacular pictures sent back by the Hubble Space Telescope evidence this. Pictures and other data from unmanned space vehicles have provided invaluable information about the planets, asteroids and comets in our solar system.
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