Everything about Coma Cometary totally explained
In
astronomy, a
coma (from the
Latin word for "hair") is the nebulous envelope around the
nucleus of a
comet. It is formed when the comet passes close to the
sun on its highly
elliptical orbit; as the comet warms, parts of it
sublimate.
The coma is generally made of
ice and
dust. Larger dust particles are left along the comet's orbital path while smaller particles are pushed away from the Sun into the comet's tail by
light pressure.
This gives a comet a "fuzzy" appearance when viewed in
telescopes and distinguishes it from
stars.
Stardust was a
NASA mission to recover samples of a comet's coma.
In some cases, such as the
Great Comet of 1882, a comet develops a notable anti-tail, which appears to pointing toward the Sun.
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