Earth and Space Project

Astroids, Meteroids, Meteor, Meteorite, and Comets

Astroids

They are small, airless rocky worlds revolving around the sun that are too small to be called plants. Mass of an astroid is less than earths moon. Most Astroids lie between Mars and Jupiter. Known as minor planets.

Meteroids

A small, rocky or metallic body revolving in interplanetary space around the Sun. A meteoroid is a significantly smaller than an astroid, ranging from small grains or particles to the size of large boulders.


Meteor

A small body of rocks that are from outer space that enters earths atmosphere and looks like a shooting star because of all the gases burning in the tail of it. They are caused by comets that have decayed


Meteorites

A body of rock that has landed on earths surface. About 90% of the meteorite is rock and the other part is Iron and Nickel. They are believed to be fragments of comets and astroids.


Comets

A comet is an icy body of rock that releases gas or dust. Comets contain dust, ice, carbon dioxide, ammonia, methane and more. Some researchers think comets might have originally brought some of the water and organic molecules to Earth that now make up life here. It revolves around the sun with the nucleus and coma pointing towards the sun and the tail pointing away from the sun.


Cont. on Comets

There is a Nucleus, Coma, Dust tail, and Ion.


Nucleus- first part of the comet, contains different chemicals in varying amounts. Very middle of the Comet.

Coma- nucleus gets warm when it approaches the sun, releasing water gases and dust forming the coma. Its a fuzzy haze around the nucleus.

Dust tail- as the nucleus and coma move closer to the sun they start to vaporize the ice on it cause the the dust tail.

Ion- gasses are ionized. They are pushed away from the sun and forming the ion trail. The tail is blue because of all the gases


Famous Comet

The most famous comet is Halleys Comet. It returns to the earth about every 75 years. Thought to return in 2061. It is named after an english astronomer named Edmond Halley.