Oort Cloud Trivia Questions

It's a theoretical sphere of icy planetesimals, extending up to 100,000 AU from the Sun, far beyond the Kuiper Belt.

The Oort Cloud, a distant spherical shell of icy bodies, is theorized to be the origin of most long-period comets, which have orbital periods greater than 200 years.

The Oort Cloud begins about 2,000 AU from the Sun; Voyager 1, the farthest spacecraft, is only about 163 AU away and will take ~300 years to reach its inner edge. Thus, no spacecraft has ever passed through it.

Oort Cloud objects are primarily icy, not rocky, because they formed far from the Sun where water and other volatiles freeze.

The Oort Cloud's outer edge is about 1.5 light-years away, while Proxima Centauri is 4.25 light-years away, so the cloud is indeed closer.

In 1950, Dutch astronomer Jan Oort hypothesized a vast spherical shell of icy bodies as the source of comets with extremely long orbital periods.

Passing stars can gravitationally nudge Oort Cloud objects, sending them toward the inner solar system as long-period comets.

Its total mass is estimated at only a few Earth masses, far less than the combined mass of all planets, especially Jupiter.