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Comets
Comets are small heavenly bodies that orbit the Sun. Comets have a wide range of orbital periods, ranging from a few years to hundreds of thousands of years. In the outer Solar System, comets remain frozen and are extremely difficult or impossible to detect from Earth due to their small size.

Description

A comet is an icy small Solar System body (SSSB) that, when close enough to the Sun, displays a visible coma (a thin, fuzzy, temporary atmosphere) and sometimes also a tail. Comets have a wide range of orbital periods, ranging from a few years to hundreds of thousands of years. Listings in this class present sites related to the study of various comets.

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Sky and Telescopes [ http://www.skyandtelescope.com/ ]

PR: 8

Contains information in calculating the brightness of the comet and techniques in observing the object.

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Article

Comets

Comets are small heavenly bodies that orbit the Sun. Comets have a wide range of orbital periods, ranging from a few years to hundreds of thousands of years. In the outer Solar System, comets remain frozen and are extremely difficult or impossible to detect from Earth due to their small size. [ Read more ]