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I'm in my first year at university <a href=" http://ziplinegear.biz/best-online-writing-services/ ">personal statement paper hp</a> Commonly confused with comets, asteroids are made up of hard chunks of rock, and meteors are asteroids that enter Earth's atmosphere. Whereas asteroid-observation might require a nightlong stargazing stakeout, comets generally move more slowly through the night sky and can usually be seen for several nights. And a cometâs path, and its orbit speed, can be predicted through nights of observation, says Mr. West.
