Dirty snow balls, so dirty they are blacker than graphite (pencil lead).
When they approach the sun some of the snow vaporizes (sublimes) and the dirt released is blown away from the sun, reflecting sunlight forming a bright "tail".
No. Comets are much smaller than planets, are irregular in shape, and have highly eccentric orbits.
Asteroids, Comets
Comets with extremely elliptical orbits like Hyakutake and Hale-Bopp are known as long-period comets. They have orbits that take them far out into the solar system, sometimes beyond the outer planets, before returning back towards the Sun. These comets can take decades or even centuries to complete a single orbit.
The singular form is comet, the plural form is comets, the possessive plural is comets'. Example: The comets' paths will not cross.
Comets are Comets and Asteroids are Asteroids
comets
Comets
asteriods and comets are different because when asteriods hit earth we are going to to have destroyed buildings and places on eath and comets are like particles in the galaxy and its when they destroy planets and make them into a different shape or sized in the galaxy.
Plants are normal and stars are like comets
its a booboo like appearance and smells like leaundra gates
There are no comets on Neptune because Neptune is a planet and comets are, well, comets. They have nothing to do with each other.
comets crash into all planets!Planets don't have comets. Planets have moons. Comets orbit the sun