Question

Asteroids are thought to be pieces of large planet which exploded

Answer 1

Answer:

Explanation:

The nine planets and at least 39 moons to the Sun than Mercury. It came are only a tiny part of the population that circles the Sun. There are huge numbers of smaller objects: comets, asteroids, large cosmic rocks and small pebbles, and innumerable particles of dust. Each object makes its own con- tribution to the solar scenery, and each has its own secrets to reveal. These small objects have been less studied, and none have yet been visited by a spacecraft. Our main source of information has been observations through the telescope and study of meteorites, which are part of the extraterrestrial materials that fall to Earth at a rate of several hundred tons per day.

Asteroids and meteorites

There is no planet between Mars and Jupiter. Instead, there are a great many small objects called asteroids where a planet might have formed. About 2000 have been observed sufficiently so that their orbits are known. Most of them are irregular rocks a few kilometers across, but a dozen are about 250 kilometers (160 miles) or more in diameter. The largest, Ceres, has a diameter of about 1000 kilometers (about 600 miles) and is roughly the size of Texas. It has been estimated that there may be a half-million asteroids larger than one kilometer (0.6 miles) in diameter, nearly all too small to be observed by current methods.

Answer 2

Explanation:

Asteroids are rocky worlds revolving around the sun that are too small to be called planets. They are also known as planetoids or minor planets. There are millions of asteroids, ranging in size from hundreds of miles to several feet across. In total, the mass of all the asteroids is less than that of Earth's moon.

Despite their size, asteroids can be dangerous. Many have hit Earth in the past, and more will crash into our planet in the future. That's one reason scientists study asteroids and are eager to learn more about their numbers, orbits and physical characteristics. If an asteroid is headed our way, we want to know that.