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Astronomy - What is a meteorite? #2
Zielle S.
4/21/2015


What is a meteorite #2

The Meteor Crater is a place in the western part of the United States where a large meteorite collided with Earth a very long time ago. The huge meteorite made a bowl-shaped hole that is more than 550 feet (167.6 meters) deep and nearly a mile (1.6 kilometers) across.
Scientists have discovered that comets are really just big balls of dirty ice. Unlike meteor showers, which take place several times a year a comet appearing in the sky is an event that does not often occur.

Did you know?
Comets often get their name from the people who first spot them. On July 2, 1995, a Mr. Hale in New Mexico and a Mr. Bopp in Arizona spotted the same new bright comet in the night sky. This new comet was named Hale-Bopp Comet.

Comets travel in large orbits around the sun. Halley’s Comet is probably the most famous comet. It keeps coming back every 75 or 76 years and will not be seen again until 2061 or 2062. Most comets come back every few times and do not return.

The first recorded sighting of Halley’s Comet was in 240 B.C. in the country of China.

That was a very long time before Jesus was born.
How do we know about it?

Astronomers in China wrote about the great comet appearing. It must have been so wonderful to see! The astronomers of China described it carefully in their notes. The comet was no doubt much more magnificent in China at that time than it will be when it appears again.

Why was the comet so bright in 240 B.C.?

It would have looked brighter in China in 240 B.C. because comets are brightest when they first begin orbiting around the sun. As a comet moves toward the sun, it increases speed, and some or all of the comet may be burned up. One comet, called the Great Daylight Comet of 1882, split up into five different comets.

By 1910 Halley’s Comet had orbited around the sun several times, but it was still so bright many people thought it was going to collide with Earth. We know now that Halley’s Comet and Earth did not collide.

Most comets are not visible to people who are not astronomers. Only when comets come near the sun do they become bright enough to be seen in the sky.

Did you know?
A comet can easily be seen without binoculars. We can see shooting stars better when there are no clouds, when there is no moonlight, and in the country away from the city lights.

TO BE CONTINUED...
I hope you enjoyed this! :)
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