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Comet - Wikipedia


A comet is an icy small Solar System body that, when passing close to the Sun, heats up and begins to outgas, displaying a visible atmosphere or coma, and ...

What is a comet?


Comets are often referred to as "dirty snowballs." They are left over from the formation of stars and planets billions of years ago. Before zipping around the Sun ...

What is a comet? | Cool Cosmos


Comets are basically dusty snowballs which orbit the Sun. They are made of ices, such as water, carbon dioxide, ammonia and methane, mixed with dust.

Whats A Comet?


Sep 26, 1996 ... What's A Comet? A comet is a small body in our solar system that orbits the Sun much as do the Earth and the planets, except that comets ...

Comets For Kids - What Is A Comet - Planets For Kids


What is a comet? A comet is basically a big ball of ice and rock. Where do they come from? They are leftovers from the beginning of the solar system. Why dose  ...

What is a Comet? - Views of the Solar System


Comets are small, fragile, irregularly shaped bodies composed of a mixture of non-volatile grains and frozen gases. They usually follow highly elongated paths  ...

What's in the heart of a comet? :: NASA Space Place


A comet's nucleus, or heart, is the solid chunk of something in the center of its fuzzy coma. As it approaches the Sun, some of its surface boils off and creates a  ...

Comets: Facts About The 'Dirty Snowballs' of Space - Space.com


Nov 15, 2014 ... Learn about the composition and orbit of comets, as well as the history of their discovery, famous comets and space missions to analyze them.

What is a comet? | Where do comets come from? - Sky & Telescope


Jul 15, 2014 ... Like asteroids, comets are suspected to be remnants of planet formation in the Solar System about 4.6 billion years ago. But while asteroids are ...

Comets - Astronomy For Kids - KidsAstronomy.com


Tells where comets come from, and a few pictures too.

Comets are small Solar System bodies composed of ice and dust. They have thin, temporary atmospheres called comas and tails made of dust and gas.