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Oort cloud - Wikipedia
The Oort cloud (/ ɔːr t, ʊər t /), sometimes called the Öpik–Oort cloud, is theorized to be a vast cloud of icy planetesimals surrounding the Sun at distances ranging from 2,000 to 200,000 AU (0.03 to 3.2 light-years). The concept of such a cloud was proposed in 1950 by the Dutch astronomer Jan Oort, in whose honor the idea was named.
Oort Cloud: Facts - NASA Science
Oort Cloud: Facts. 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 between 5,000 and 100,000 astronomical units.
Oort cloud | Astronomy & Formation Process | Britannica
Oort cloud, immense, roughly spherical cloud of icy small bodies that are inferred to revolve around the Sun at distances typically more than 1,000 times that of the orbit of Neptune, the outermost known major planet. Named for the Dutch astronomer Jan Oort, who demonstrated its existence, the Oort.
Oort Cloud - NASA Science
Scientists think the Oort Cloud is a giant spherical shell surrounding our solar system. It is like a big, thick-walled bubble made of icy pieces of space debris the sizes of mountains and sometimes larger. The Oort Cloud might contain billions, or even trillions, of objects. Quick Facts.
Solar System Tour - Oort Cloud
Oort Cloud. The distant Oort cloud marks the gravitational edge of the Solar System, in a vast region of undiscovered objects. The boundary between the Kuiper Belt and Oort cloud is less distinct.
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