For scientific purposes, they can be studied to help understand components in the solar system and its history. They are normally of a different form of rock that you find on Earth, and are believed to be left over remnants from the formation of planets in our solar system.
Comets are made up of remnants from the early solar system, so their age is generally around the same as our solar system, approximately 4.6 billion years old. While some comets may contain even older material from beyond our solar system, as a whole, comets are not older than our solar system.
Nobody let them in. They formed with the solar system.
Most "asteroids" are in orbit around the Sun, unless disturbed by gravity or collisions. Comets may orbit the Sun regularly, or be drawn in from the outer solar system and pass by the Sun on their way back out (hyperbolic comets).
Comets Time Capsules of the Solar System - 1981 was released on: USA: 1981
It has been suggested that comets originate in the Oort cloud and then travel in long elliptical orbits around the Sun.
Yes. The solar system is everything that orbits the sun.
All the comets that have been seen in history were in the solar system and most still are.
Comets are made up of remnants from the early solar system, so their age is generally around the same as our solar system, approximately 4.6 billion years old. While some comets may contain even older material from beyond our solar system, as a whole, comets are not older than our solar system.
If the comet has enough movement energy, it might leave the Solar System forever. Otherwise, the Sun's gravity will eventually slow it down, and the comet will return.
I scientifically believe that comets are closer to the outer part of the solar system.
Nobody let them in. They formed with the solar system.
There are no visible comets at this time.
The sun.
By definition, long period comets come from within the gravitational pull of this solar system; when they leave the solar system, they are no longer considered to have a period.
Most "asteroids" are in orbit around the Sun, unless disturbed by gravity or collisions. Comets may orbit the Sun regularly, or be drawn in from the outer solar system and pass by the Sun on their way back out (hyperbolic comets).
Comets Time Capsules of the Solar System - 1981 was released on: USA: 1981
the members of the solar system are sun, comets, planets, asteroids,