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Planets are mostly the same shape: a sphere, albeit a marginally irregular one. They are different sizes by random chance. The size is determined by how much matter and what type was near the object at the start of its life, as a protoplanet.

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How do the orbits of comets differ from the orbits of most asteroids?

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.


Which is the smallest comets or asteroids or planets or moons?

Any of them because there is no set size for any of them. All of them are classified by different things and none of them are size. A moon orbits a planet, a planet orbits a star in a slightly elliptical orbit, a comet orbits a star in a highly elliptical orbit, and an asteroid is a planet or moon (any celestial object really) that is out of orbit and is flying through the universe a high speeds. For instance, a moon can be bigger than a planet.


Rock liquid or gas that orbits the sun?

Rock: asteroid. Liquid: none. Gas: comet.


The moon orbits what planet?

The moon with the specific name 'The Moon' orbits planet Earth.


Why don't the rocks from tail of a connet fall on the earth?

Sometimes they do; that's what a "meteor shower" is. The point is that all of the rocks and dust given off by a comet, and the head of the comet too, travel the way gravity and the light pressure of the Sun force them to. The head of the comet is freely falling towards the Sun. (if a comet gets close enough to a planet, the gravity of the planet becomes significant, and sometimes the comet will collide with the planet; look at Shoemaker-Levy 9, which hit Jupiter in 1994.) As the heat of the Sun begins to melt the ices of the comet, gas and dust escape from the comet. Because the gas molecules and dust particles are very light, the pressure of the Sun's light pushes them away from the comet; this forms the "tail" of the comet. Over the course of thousands of orbits, the gas and dust spreads out to fill in much of the orbit of the comet. Where the Earth's orbit intersects the comet's orbit, we see annual meteor showers.

Related Questions

How do the orbit of planets differ from the orbit of moons?

A planet orbits a star. A moon orbits a planet or dwarf planet.


Planet's orbits are nearly circularWhat shape is the comet's?

Comet orbits are typically elliptical, meaning they are elongated and not circular like planet orbits. This can result in comets having highly eccentric paths around the Sun.


Is a comet a moon?

No. A comet orbits a star such as the sun. In order to be a moon it must orbit a planet or some similar body.


Do all planet relove around sun or earth?

Every planet, asteroid and comet in our solar system orbits the sun. The only natural body that orbits Earth is its moon.


How many years does a comet orbits planet earth?

Comets don't or it the earth, they are in long irregular orbits around the sun. These orbits can range from a few years to thousands of years.


How should you answer?

The planet Jupiter orbits the comet Pluto in an ellipse and is visible in the sky every time a shark is caught by crabfishermen.


What do you call a body in the solar system that is not a star or a planet?

It depends on what the object is. If it orbits a planet, then it is a moon. If it orbits the sun and is made of rock and/or metal then it is an asteroid or meteoroid depending on its size. If it is primarily made of ice then it is a comet. Dwarf planets are planet-like objects that do not meet all the criteria of a planet.


Is halleys comet part of the solar system?

Yes. Halley's Comet is a comet that orbits our sun, and the definition of "Part of the solar system" is 'Any object that orbits our sun.'


Is Halley's comet a planet or a comet?

It is a comet.


Planet 's orbits are nearly circular .what shape is a comet's?

All orbits are geodesic curves. Comets tend to have elliptical orbits ... as do planets, really; the degree of eccentricity (this is a measure of how "stretched" the ellipse is) just tends to be higher for comets.


Is Halley's Comet a planet?

No. It is a comet. It is too small to be a planet.


What is a ball of ice dust and gasses that travels through space and orbits the sun?

a comet/meteorite