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.
These phenomena are both due to the effects of solar radiation and the solar wind upon the nucleus of the comet. Comet nuclei range from a few hundred meters to tens of kilometers across and are composed of loose collections of ice, dust and small rocky particles. Comets have been observed since ancient times.
More symbols in Astrological Symbols:
Astrological symbols are images used in various astrological systems to denote relevant objects. Symbols for the classical planets, zodiac signs, aspects, lots, and the lunar nodes appear in the me… read more »
More symbols in Astronomical Symbols:
Astronomical symbols are symbols used to represent various celestial objects, theoretical constructs and observational events in astronomy. The earliest forms of these symbols appear in Greek papyri … read more »