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Comet - Wikipedia
Similarly, although the literal meaning of "non-periodic comet" is the same as "single-apparition comet", some use it to mean all comets that are not "periodic" in the second sense (that is, to also include all comets with a period greater than 200 years).
Overview | Comets – Solar System Exploration: NASA Science
Comets are cosmic snowballs of frozen gases, rock and dust that orbit the Sun. When frozen, they are the size of a small town. When a comet's orbit brings it close to the Sun, it heats up and spews dust and gases into a giant glowing head larger than most planets.
Comets: Facts About The 'Dirty Snowballs' of Space
Credit: Michael Jäger Naming. In general, comets are named after their discoverer. For example, comet Shoemaker-Levy 9 got its name because it was the ninth short-periodic comet discovered by ...
Comets | NASA
NASA.gov brings you the latest images, videos and news from America's space agency. Get the latest updates on NASA missions, watch NASA TV live, and learn about our quest to reveal the unknown and benefit all humankind.
Comets | Facts and Information on Visible Comets
Comets are a wondrous sight for amateur astronomers. As one approaches it often reveals a tail, slowly unfurling a long ghostly banner of light.
Comet Facts ☄ - Interesting Facts about Comets - Space Facts
What is a Comet? A comet is a very small solar system body made mostly of ices mixed with smaller amounts of dust and rock. Most comets are no larger than a few kilometres across. The main body of the comet is called the nucleus, and it can contain water, methane, nitrogen and other ices.
In Depth | Comets – Solar System Exploration: NASA Science
The path through the solar system is a rocky road. Asteroids, comets, Kuiper Belt Objects—all kinds of small bodies of rock, metal and ice are in constant motion as they orbit the Sun.
Comets - TheSkyLive
Comets. Browse and discover detailed information about 138 of the most interesting comets. Comets are listed in order of decreasing brightness.
Comets: Crash Course Astronomy #21
Today on Crash Course Astronomy, Phil explains comets. Comets are chunks of ice and rock that orbit the Sun. When they get near the Sun the ice turns into gas, forming the long tail, and also ...
Comet Facts - Comets - Astronomy for Kids
Comets come from either the Oort Cloud or the Kuiper Belt. The two are both areas packed with trillions of comets! There is an important difference between the two.