Asteroids and comets are two examples of objects in the solar system besides moons and planets. Asteroids are rocky objects that orbit the Sun, mostly found in the asteroid belt between Mars and Jupiter. Comets are icy bodies that also orbit the Sun, with tails that form when they come close to the Sun.
In prehistoric times large objects have caused big craters. Whether before impact these would have appeared like comets is a matter for debate. A comet is a celestial body. Anything that enters the earths atmosphere and/or strikes the earth is deemed a meteorite
All orbits are ellipses; this is true for both planets and for comets. Cometary orbits are somewhat extreme ellipses, where the difference between the perihelion (closest to the Sun) is very different from the aphelion (farthest from the Sun) distance. This difference is called "eccentricity". Planets have relatively low eccentricity; for Earth, for example, the eccentricity is only 3%. Some comets don't have an "orbit" at all. An "orbit" implies that the comet will eventually come back. But some comets are "hyperbolic"; their paths aren't an ellipse, but a hyperbola. A hyperbolic comet is a one-time visitor to the solar system; it has fallen in from interstellar space, and will be going back out to interstellar space.
Well, darling, the main difference between the orbit of a comet and a planet is that comets have more eccentric orbits, swinging in from the cold depths of space with their tails wagging behind them like a mischievous puppy. Planets, on the other hand, follow more predictable, circular paths around the sun like responsible adults going about their business. So, in a nutshell, comets are the wild child of the solar system, while planets are the well-behaved siblings.
Dust and rocks in space come from various sources, including remnants of the early solar system, asteroids, comets, and debris from collisions between celestial bodies. These particles can range in size from tiny grains of dust to larger rocks and boulders. They can be scattered throughout space or concentrated in specific regions, such as asteroid belts or debris fields around planets.
Asteroids comets and meteoroids all are masses of land sometimes inflamed and usually come from parts of planets hurtling through space.
As far as we know, no rogue planet has ever come near Earth. Comets and asteroids have come near Earth, but not actual planets.
They come from the outer reaches of space.
The planets in the solar system are in well-spaced out, stable, roughly circular orbits - they don't come close enough to collide with each other. Asteroids and comets, however, are on more elliptical, unstable orbits that often cross the orbits of the planets, and sometimes planets collide with asteroids and comets.
Mostly comets follow elliptical orbits just like the planets, except more elongated (eccentricity higher). A few comets that come from deep space are on hyperbolic orbits and are very fast-moving, they visit once and never come back because they have enough kinetic energy to escape again.
Asteroids are the celestial bodies found in between the spaces of the planets of the solar system. But comets are mysterious bodies that go far away from the known solar system and come back once very rarely.
Comets come from the Oort cloud and the Kupier Belt
First they study the subject, then they come up with questions that other people may want to know the answer to. After that, they use their studies and knowledge of physics to come up with a believable and reasonable way that something could be what they think it is.
Comets are solid pieces of rock that are in long elliptical orbit around the sun. They occur because pieces of other space objects (asteroids, moons, planets, etc.) were knocked off into this path, and the path just happens to come close to the Earth.
That is a totally NO!
comets of asteroids .
They are from extreme outer parts of the solar system (known as "Kuiper belt") and from a huge cloud of comets lying far beyond the orbit of Pluto, completely surrounding the Sun (known as "Oort cloud").