Asteroids Asteroids are massive lumps of rock that orbit the Sun. They can be anything up to 1000 kilometers wide and are sometimes described as minor planets. Most asteroids in the Solar System lie in a belt – the Asteroid Belt – orbiting the Sun between Mars and Jupiter, but some are orbiting relatively nearby. These nearby asteroids are called Potentially Hazardous Asteroids or PHAs because they could collide with the Earth as gigantic meteorites. Meteorites Meteorites are bits of space debris which fall to the surface of a planet or moon.
They are really quite common. More than a tone’s worth of meteorites falls to earth every day. Traveling at several thousand meters per second, meteorites become super-heated by friction with the Earth’s atmosphere and explode on impact with the ground. A large meteorite can impact with the force of several nuclear bombs and even cause the climate to change. It’s thought that a very large meteorite caused the extinction of the dinosaurs. And a meteorite the size of a small house caused the crater below.
It is over one kilometer in diameter and 200 meters deep. The Solar System The Solar System is our local neighborhood in space. The Solar System is composed of the Sun and its satellites. The Sun’s satellites include major bodies such as planets and countless other, minor bodies such as asteroids and comets – anything in fact that orbits the Sun. There are presently nine planets in the Solar System.
The Sun The sun is the largest object in the solar system. It is a middle-sized star and there are many other stars out in the universe just like it. Even though it is only a middle-sized star it is large enough to hold over 1 million Earth's inside if it were hollow. The temperature on the sun is far too much for any living thing to bear. On the surface it is 10, 000 degrees Fahrenheit and the ...
To remember their first letters in order from the Sun, remember: Most Very Elderly Men Just Sleep Under News Papers.