In 1950, astronomer Jan Oort proposed that certain comets come from a vast, extremely distant spherical shell of icy bodies surrounding the solar system. This giant swarm of objects, now named the Oort Cloud, occupies space at a distance …

2025年1月2日 · The Oort Cloud lies far beyond Pluto and the most distant edges of the Kuiper Belt. While the planets of our solar system orbit in a flat plane, the Oort Cloud is believed to be a giant spherical shell surrounding the Sun, planets and Kuiper Belt Objects.

2025年1月22日 · The Kuiper Belt is a large, doughnut-shaped region of icy bodies extending far beyond the orbit of Neptune. The Kuiper Belt is home to Pluto and Arrokoth. Both worlds were visited by NASA's New Horizons spacecraft. There may be millions of other icy worlds in the Kuiper Belt that were left over from the formation of our solar system.

[4] [6] The innermost portion of the Oort cloud is more than a thousand times as distant from the Sun as the Kuiper belt, the scattered disc and the detached objects—three nearer reservoirs of trans-Neptunian objects. The outer limit of the Oort cloud defines the cosmographic boundary of the Solar System.

2002年4月17日 · This illustration shows that the Kuiper Belt is shaped like a disk [see inset diagram] and resides within the shell-like structure of the Oort Cloud. Located on the outskirts of the solar system, the Kuiper Belt is a "junkyard" of countless icy bodies left over from the solar system's formation.

2014年12月22日 · ‘Cloud’ is a correct term, as the Oort comets are distributed spherically about the Sun, possibly extending as far as half way to the next star. The Oort orbits are not regular or planar like the Asteroid and Kuiper belts, and are often perturbed through gravitational interactions during their long journeys on highly eccentric orbits.

2025年1月2日 · Unlike the planets, the main asteroid belt and many objects in the Kuiper Belt, objects in Oort Cloud do not necessarily travel in the same direction in a shared orbital plane around the Sun. Instead, they can travel under, over and at various inclinations, around the Sun as a thick bubble of distant, icy debris.

2023年5月2日 · The main difference between Kuiper belt and Oort cloud is that the Kuiper Belt is a region of space located in the plane of the ecliptic, beyond Neptune’s orbit but still relatively close to the Sun, while the Oort Cloud is much farther away and is located in a spherical shell around the solar system

2024年9月12日 · The Oort cloud surrounds the Sun, planets, and Kuiper Belt in a vast spherical shell. It forms a distant reservoir of icy bodies, containing billions of frozen objects. The inner edge of the Oort cloud begins at 2,000 to 5,000 astronomical units (AU) from the Sun.

2024年4月23日 · The Oort Cloud starts at the outer edge of our solar system, beyond the Kuiper Belt. It does not conform to the plane of our solar system, which means it’s not part of the solar system pancake, but instead is thought to be a giant sphere that surrounds the entire thing.