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Comet
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Comets are lumps of <a href="/s/stone">rock</a> and <a href="/i/ice">ice</a> that travel around the <a href="/s/sun">sun</a>. They are usually a few kilometers across. When they get close to the sun, they develop a <i>tail</i>. The tail of the comet always points away from the sun.
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Astronomy
Comets are lumps of
rock
and
ice
that travel around the
sun
. They are usually a few kilometers across. When they get close to the sun, they develop a
tail
. The tail of the comet always points away from the sun.
NPS/Patrick Myers
/
Public Domain