Hills cloud
Vast, theoretical circumstellar disc / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Hills cloud?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
For the gravitational sphere of astronomical bodies, see Hill sphere.
In astronomy, the Hills cloud (also called the inner Oort cloud[1] and inner cloud[2]) is a theoretical vast circumstellar disc, interior to the Oort cloud, whose outer border would be located at around 20,000 to 30,000 astronomical units (AU) from the Sun, and whose inner border, less well defined, is hypothetically located at 250–1500 AU,[citation needed] well beyond planetary and Kuiper Belt object orbits—but distances might be much greater. If it exists, the Hills cloud likely contains roughly 5 times as many comets as the Oort cloud.[3]