Search results
Results from the WOW.Com Content Network
The Oort cloud is thought to have developed after the formation of planets from the primordial protoplanetary disc approximately 4.6 billion years ago. [4] The most widely accepted hypothesis is that the Oort cloud's objects initially coalesced much closer to the Sun as part of the same process that formed the planets and minor planets.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
The Oort cloud (artist's rendering pictured) is a hypothesized spherical cloud of comets that may lie nearly a light-year from the Sun. It is thought to comprise two separate regions: a spherical outer Oort cloud and a disc-shaped inner Oort cloud, or Hills cloud; the outer extent of the cloud defines the boundary of the Solar System.
A proposal for such an area of replenishment is the Oort cloud, possibly a spherical swarm of comets extending beyond 50,000 AU from the Sun first hypothesised by Dutch astronomer Jan Oort in 1950. [34] The Oort cloud is thought to be the point of origin of long-period comets, which are those, like Hale–Bopp, with orbits lasting thousands of ...
The hypothesized Oort cloud is thought to be a spherical cloud of icy bodies extending from outside the Kuiper belt and the scattered disk to halfway to the nearest star. During planet formation interactions of protoplanetary disk objects with the already developed Jupiter and Neptune resulted in the scattered disc and the Oort cloud. [86]
Theoretically, from the edge of the solar system in a big cloud called the Oort cloud. The comet hasn't come this close to Earth for 50,000 years, supposedly, because the orbital period is said to ...
The Oort cloud is a hypothesized spherical cloud of comets that may lie nearly a light-year from the Sun. It is thought to comprise two separate regions: a spherical outer Oort cloud and a disc-shaped inner Oort cloud, or Hills cloud; the outer extent of the cloud defines the boundary of the Solar System.
The Oort cloud is thought to occupy a vast space starting from between 2,000 and 5,000 AU (0.03 and 0.08 ly) [109] to as far as 50,000 AU (0.79 ly) [85] from the Sun. This cloud encases the celestial bodies that start at the middle of the Solar System—the Sun, all the way to outer limits of the Kuiper Belt.