Comets are generally fairly large, dozens or hundreds of miles in diameter. Small compared to planets or asteroids, but large compared to meteors or dust.
they belived that comets are small and big
No. Comets are much smaller than planets.
No, comets and meteors are not considered to be small planets. Comets are simply considered to be comets, and meteors are simply considered to be meteors. (Meteors are asteroids that have entered the atmosphere.)
Too small.
comets
Some comets are made of ice and dust.
Comets are made mainly from ice, with a slight mixture of small rocks and dust.
Comets are seen by reflected sunlight. They may be too small, too distant or a combination of both
Comets are made mainly from ice, with a slight mixture of small rocks and dust.
No... they're far too small to support an atmosphere.
Comets are small solar system bodies that orbit around the Sun. They are not planets because NASA said so.
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