All objects that orbit the sun have elliptical orbits so the distance varies. Smaller bodies can be perturbed from their orbits comparatively easily and so can have extremely eccentric orbits.
Comets are the most visibly notable for this. Some travel inside the orbit of Venus and even Mercury and out again to beyond Pluto. On occasion their orbits can be so disturbed that they leave the solar system for ever or impact the sun or planets. As happened with Shoemaker-Levy 9 when its orbit was disturbed by Jupiter and collided with it in 1994.
Comets are balls of ice and dust in orbit around the Sun. The orbits of comets are different from those of planets - they are elliptical. A comet's orbit takes it very close to the Sun and then far away again.
The solar system contains far more than 3 objects. The major objects are the sun and the 8 planets. There are also 3 dwarf planets that we have located, and countless asteroids, comets, and meteoroids.
Comets contain ice.
are approximatly 345,897,631,973 miles away from the sun
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Asteroids are rocky and have a relatively circular orbit around the Sun. Comets are icy and have a stretched oval-shaped orbit around the Sun.
The moon was studied to see how old it was. Since there is no atmosphere, we can study the effects of comets and asteroids far better.
Comets are physically very remote (far away from) from almost everything, they resemble (are similar to) dirty snowballs.
They are relatively small and far away.
Comets are considered minor members of the solar system because they are smaller and less massive than planets and asteroids. They are composed of ice, dust, and rocky material, and often have highly elliptical orbits that take them far from the Sun. Comets are less numerous and play a smaller role in the dynamics and structure of the solar system compared to planets and asteroids.
Comets are believed to have originated from asteroids in a sort of 'cloud', called the 'Oort Cloud'. It is thought all comets come from the Oort Cloud, which is a cloud of asteroids beyond the Kuiper Belt beyond Neptune. When one asteroid is knocked off from its orbit from the Oort Cloud, it makes really long trips around the Sun, which is why it becomes a comet. All of the asteroids in the Oort Cloud have some type of ice on them, since they are so far away from the sun that everything in the Oort Cloud seems to freeze.
It is from interstellar gas and dust that we all came. The stars, planets, asteroids, and comets all came from clouds of gas and dust. As far as OUR gas and dust NOW, nothing much is produced. Its mostly all used up in the making of us.