Oort comets were formed in a few locations, including distances as far as Neptune, Jupiter, Saturn or Uranus's orbits. These comets are affected by the passing stars, and that sends some of them into the inner solar system.Know More
Oort cloud comets likely formed around 4.6 billion years ago near where Saturn and Uranus are at the present time. Those comets were then deflected outward, according to Astronomy Notes, which caused them to be ejected out of the solar system or destroyed when traveling too close to Jupiter or to head into the Kuiper Belt if they were formed near Neptune's current orbit.
To understand the creation of the comets in the Oort Cloud, a person must know what the Oort Cloud is. The Oort Cloud is a large, spherical cloud. It has a radius between 50,000 and 100,000 A.U., and it is filled with billions or even trillions of comets.
People learning about the Oort Cloud should be aware that it has never been observed directly. Its existence is only inferred, which means that scientists believe it exists due to evidence and despite the fact that it has never been seen. Scientists determined its existence through the observation of long period comets, which have elliptical orbits.Learn more about Comets & Asteroids
Comet ISON entered the inner solar system at a relatively shallow angle above the orbits of the planets, and then it left the inner solar system at a much steeper angle above the ecliptic. ISON spent approximately four months closer to the sun than the orbit of Mars. From early October to early December 2013, the comet moved toward the sun before leaving the inner solar system.Full Answer >
Comets that appear in the inner solar system have generally been pulled by the sun's gravity from one of two large clouds in the outer solar system. The cometary nuclei in these formations, the Kuiper belt and the Oort cloud, formed around the same time in the early solar system. Since that time, around 4.6 billion years ago, the Kuiper belt has changed very little.Full Answer >
Asteroids and comets differ in composition due to where they were formed. Most asteroids are the rocky remnants of failed planets created in the inner solar system, while comets formed further out where frozen gases and liquids could not be thawed by the heat of the sun.Full Answer >
Asteroids and comets have several things in common, including a relatively small size as compared to planets and a lack of a viable atmosphere. Asteroids range in size from a few feet to several miles in diameter. Comets are generally smaller, with a rocky core. Both comets and asteroids don't have enough gravity to keep atmospheres.Full Answer >