Anjali- Science- Astronomy Project

Anjali- Science- Astronomy Project - Anastasia N. Sara Sa...

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Anastasia N. Sara Sa Anjali Wadhwa Period 6 10/3/06 Astronomy and Cosmology Project (Meteoroids, Asteroids, and Comets; Evidence and Past Collisions) Meteoroids: A meteoroid is a relatively small (sand- to boulder-sized) fragment of debris in the Solar System. It is matter revolving around the sun or any object in space that is too small to be called an asteroid or a comet. The size limit of meteoroids is between 100 micrometers and 10 meters across. Even smaller particles are called micrometeoroids or cosmic dust grains, which includes any interstellar material that should happen to enter our solar system. It is thought than an object must be about 50 m across before it can survive atmospheric entry. When entering a planet's atmosphere, the meteoroid heats up and partially or completely vaporizes. The term meteor comes from the Greek meteoron, meaning phenomenon in the sky. It is used to describe the streak of light produced by gas along the path of the meteoroid as it ionized and glows. The trail of glowing vapor is called a meteor, or a
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This note was uploaded on 10/01/2011 for the course ENVIRON 100 taught by Professor Staff during the Spring '11 term at UC Irvine.

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Anjali- Science- Astronomy Project - Anastasia N. Sara Sa...

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