Planets to the edge of the Oort Cloud

The Oort Cloud is named for Jan Oort, the Dutch astronomer
who predicted its existence in the 1950s.


Oort Cloud

  • outside Neptune’s orbit is the Kuiper Belt.
  • beyond the fringes of the Kuiper belt is the Oort Cloud.
  • unlike the orbits of the planets and the Kuiper Belt, which are pretty flat like a disk.
  • it’s a giant spherical shell surrounding the sun, planets, and Kuiper Belt Objects.
  • he Oort cloud comprises two regions;

    1) There is a spherical outer Oort cloud, and a disc shaped inner cloud called the Hills cloud.
    2) Objects in the Oort Cloud are mostly composed of water ice, ammonia and methane.

  • formation – the leading idea for the formation of the Oort Cloud says that these icy objects were not always so far from the Sun – after the planets formed 4.6 billion years ago, the region in which they formed still contained lots of leftover chunks called planetesimals.

Small 'beads' central to planet formation - skyatnightmagazine

Planets to the edge of the Oort Cloud

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