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Oort

British  
/ ɔːt /

noun

  1. Jan Hendrick. 1900–92, Dutch astronomer, who confirmed (1927) and developed the theory of galactic rotation. He was the first to propose (1950) the existence of a mass of comets orbiting the sun far beyond the orbit of Pluto (the Oort cloud )

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Dyson said the Oort Cloud has more real estate than all the planets in our solar system, and therefore we’ll eventually find a way to adapt to life there.

From Slate Dec. 9, 2025

And what, you ask, is the Oort Cloud?

From Los Angeles Times Oct. 11, 2024

The Oort Cloud, a hypothesized shell of icy worlds at an unfathomable distance from the sun, has never been directly seen—and VRO won’t change that.

From National Geographic Jan. 9, 2024

But, the team calculated, it's slightly more likely that a rogue, Neptune-like planet from another solar system was snagged by the sun's gravity and came to rest somewhere in the Oort cloud.

From Scientific American Jun. 28, 2023

Properly called the Öpik–Oort cloud, it is named for the Estonian astronomer Ernst Öpik, who hypothesized its existence in 1932, and for the Dutch astronomer Jan Oort, who refined the calculations eighteen years later.

From "A Short History of Nearly Everything" by Bill Bryson

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