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 ...
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
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.
Explains what is inside a comet, how it moves, and the two most famous comets.
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 ...
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
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.
Comets are small, fragile, irregularly shaped bodies composed of a mixture of
non-volatile grains and frozen gases. They usually follow highly elongated paths
Mar 8, 2012 ... 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 ...
Tells where comets come from, and a few pictures too.