Comet - Wikipedia, the free encyclopedia
Encyclopedia entry covers physical characteristics, history. List of well-known comets. ... Comets have a variety of different orbital periods, ranging from a ...
en.wikipedia.org

Comet Introduction - Views of the Solar System
Comets are small, fragile, irregularly shaped bodies composed of a mixture of ... As comets approach the Sun they develop enormous tails of luminous material that ...
www.solarviews.com

NASA - Comet
Most of the comets that can be seen from Earth travel around the sun in long, oval orbits. ... Some comets, however, become visible to the unaided eye for ...
www.nasa.gov

Comets
General information and data, pictures, details on the most interesting ones. ... Not long ago, many people thought that comets were a sign that something bad was ...
www.windows.ucar.edu

Astronomy.com - Comets
... Big Bang, black holes, comets, constellations, eclipses, exoplanets, nebulae, ... to astronomy > Intro to the sky > Comets. StarDome. Astronomy for kids ...
www.astronomy.com

Comets
As of 1995, 878 comets have been cataloged and their orbits at least roughly calculated. Of these 184 are periodic comets (orbital periods less than 200 years) ...
www.nineplanets.org

Solar System Exploration: Planets: Comets
The Solar System Exploration Home Page is part of NASA's Office of Space Science and describes NASA's program to explore the solar system.
solarsystem.nasa.gov

Comet, Comets, Halleys Comet at SPACE.com
Space.com explains a comet, comets, halleys comet, comet search and halley's comet. ... Comets Posing as Asteroids Might be Source of Earth's Water " ...
www.space.com

Comets - Astronomy For Kids - KidsAstronomy.com
Learn How Big Space Is With KidsAstronomy.com ... Many people think that a comets tail is always following behind it, but actually ...
www.kidsastronomy.com

comet: Definition from Answers.com
comet n. A celestial body, observed only in that part of its orbit that is relatively close to the sun, having a head consisting of a solid nucleus
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