By Seymour Simon
Whether they seem as far away specks in an astronomer's telescope or shoot brilliantly around the night sky, comets, meteors, and asteroids have involved sky gazers all through historical past. yet the place do those racing celestial our bodies come from, and what can they train us approximately our universe? sign up for Seymour Simon for a glance on the fiery secret and wild ask yourself of those luminous our bodies of night.
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Extra info for Comets, Meteors, and Asteroids
But where do these racing celestial bodies come from, and what can they teach us about our universe? Join Seymour Simon for a look at the fiery mystery and wild wonder of these luminous bodies of night. "— "Attractive S( IIOI ASTK l\( This edition is . . "— Booklist only available for distribution through the school market.
The and six-hundred-foot- deep Barringer Crater near Winslow, Arizona. bly left Many It was proba- iron meteorite slamming into the ground thousand years ago. Some scientists say that an even larger impact million years ago resulted in the dinosaurs extinct. sixty-five becoming Could a comet, large meteorite, or asteroid have caused other large extinctions of animals and plants in the past? Scientists are still not sure. e oids, know of hundreds of comets and thousands of aster- and each day Earth encounters millions of meteors.
S,'ome asteroids have spun out of the main belt to follow different orbits. Several same orbit as Jupiter. Earth's orbit dozen Trojan asteroids share the The Apollo asteroids swing across and approach the Sun much like some comets. In 1937 a small Apollo asteroid, Hermes, came within half a million miles of Earth. That's considered a close miss in space. Will an asteroid or a large meteorite ever hit Earth? large objects have huge hollows hit our planet in the past and in the ground called impact largest of these is the 4,150-foot-wide made by an fifty behind craters.