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עמוד:38
Booklet Page 7 Details a . The explosion creates a very bright light , which is much brighter than our Sun ' s light . b . The most famous is Halley ' s Comet , which will return to Earth's skies in 2061 . c . Earth ' s atmosphere is made up of many gases . It has four layers and is about 300 kilometers thick . d . Many people think that nothing can escape the gravity of black holes . If that were true , the whole universe would get sucked in . Only things that get within a certain distance are sucked in ; things that are farther away can escape . e . In our solar system , most are found between Mars and Jupiter . The biggest known asteroid is Ceres . f . They are often called " shooting stars" or "falling stars" and usually come from comets . Meteors can be very small or very large . Most of the meteors that hit Earth are the size of a tennis ball . 2 . Look up the terms on Student Work Page 37 in a dictionary or an encyclopedia in English or in your native language . Add more information in English about each term in the More Information column on Student Work Page 37 .
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