EBooks Article- space_5613

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EBooks Article: space
After one space flight in 1966, Armstrong joined the Apollo 11 mission. On July 20,You are not allowed to view links. Register or Login, 1969, Armstrong and Edwin E. Aldrin,You are not allowed to view links. Register or Login, Jr., landed the lunar module Eagle on the moon's surface. When Armstrong stepped onto the moon, he said,You are not allowed to view links. Register or Login, "That's one small step for man, one giant leap for mankind."

?Neil A. Armstrong was an American astronaut. He was the first person to set foot on the moon.
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Armstrong was born in Wapakoneta, Ohio. He was a Navy pilot from 1949 to 1952. Later, he tested new aircraft. He became an astronaut in 1962.
Armstrong received the Presidential Medal of Freedom in 1969.

Astronomers divide asteroids into two groups. One group is made mostly of carbon. Carbon is a soft, black substance that is plentiful on Earth. Asteroids in the second group are rich in minerals. These asteroids formed from minerals heated by the sun
Astronomers don't know exactly how asteroids were formed. They offer two possible explanations. Some think there was once a planet between the orbits of Mars and Jupiter. That planet broke up and formed the asteroids. Others think there were enough rocks and other materials between Mars and Jupiter to form a planet. But instead of forming a planet, the material became a belt of rocky objects -- the asteroid belt.

                   


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Asteroids come in many sizes. The largest asteroid, Ceres, is about 600 miles (970 kilometers) across. Ceres, the first known asteroid, was discovered in 1801. One of the smallest asteroids, 1991 BA, was discovered in 1991. It is only about 20 feet (6 meters) across. Most asteroids are less than 18 miles (30 kilometers) across.


Asteroids are small, rocky objects that orbit, or travel,You are not allowed to view links. Register or Login, around the sun. Most asteroids are found between the planets Mars and Jupiter. This area is called the asteroid belt. Astronomers, or scientists who study outer space,You are not allowed to view links. Register or Login, think there are about 30,000 asteroids in the asteroid belt.
Image to right: The asteroid Ida is about 35 miles (55 kilometers) long. It is one of thousands of asteroids in the asteroid belt, a region between the orbits of Mars and Jupiter. Credit: NASA
Neil Alden Armstrong (1930- ) was a United States astronaut. He was the first person to set foot on the moon.