Oort Cloud, Theoretical region of icy objects, Inner Oort Cloud, Region that is closer to the sun, Outer Oort Cloud, Region that is much larger, spherical shell , Jan Oort, Dutch astronomer that first proposed Oort cloud, Hills Cloud, Also known as Inner Oort Cloud, AU, Astronomical units, Cloud, it is called (blank) because its objects do not necessarily orbit in the same plane as the planets, Icy planetesimals, Oort cloud is thought to be composed primarily of what?.

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