Out of the three, planets are far larger than asteroids or comets. The technical definition of a planet is a cosmic mass that's large enough to be rounded by its own gravity, but not so large that gravity causes extreme pressures to heat the object and turn it into a nuclear furnace (a sun).
Asteroids and comets, on the other hand, are basically chunks of matter (rock and possibly ice and gases) that remain, compared to planets, irregularly shaped.
More info: https://en.wikipedia.org/wiki/Planet
Main difference:
- Asteroids are made up of metals and rocky material
- Comets are made up of ice, dust and rocky material
Extra notes:
- Asteroids formed much closer to the Sun, where it was too warm for ices to remain solid
- Comets formed farther from the sun where ices would not melt. Comets, which approach the Sun, lose material with each orbit because some of their ice melts and vaporizes to form a tail
Asteroids are composed of rocky and metallic substances. Comets have some amount of rocky material but are largely composed of various forms of ice, including frozen water, frozen methane, etc. Most comets are located in the Oort Cloud, which is tremendously more distant from the sun than the asteroid belt, and hence they are extremely cold. If the orbit of a comet is perturbed so that it approaches the sun, then some of the ice of which it is composed will boil off, which produces the visible stream of gas, pointing away from the sun, which is the most distinctive feature by which comets are known, called the comet's tail.
It depends on the different sizes there are.
An asteroid is more dense because asteroids are made of solid rock, rather than a comet is made dust and ice particles which can break apart easily.
A comet is made of ice an asteroid is rock
ether or there is no set size
Scientists usually refer to this as an asteroid, not a comet. It's the asteroid that caused the Chicxulub crater.
assteroids
An asteroid, because the orbits of the asteroids are nearer to the earth than the comets.
comet
Yes. A comet or asteroid can break up to form a chunk of rock called a meteoroid.
No. For one thing, Halley's comet is a comet, not an asteroid. The largest asteroid is Ceres, which is far larger than Halley's comet.
asteroid
An asteroid
no
No. Pluto is considered a "dwarf planet" and in terms of composition is more like a comet than an asteroid.
Scientists usually refer to this as an asteroid, not a comet. It's the asteroid that caused the Chicxulub crater.
No. Haumea is a dwarf planet and in terms of composition is more similar to a comet.
assteroids
Comet
An asteroid, because the orbits of the asteroids are nearer to the earth than the comets.
the asteroid belt is safe for now long as there ere rouge comets comet comet clos to the belt
9P/Tempel or Tempel 1 is a comet, not an asteroid.