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Oort Cloud, Illustration

The Oort cloud, named after the Dutch astronomer Jan Oort, sometimes called the Opik-Oort cloud, is a theoretical cloud of predominantly icy planetesimals believed to surround the Sun to as far as somewhere between 50,000 and 200,000 AU (0.8 and 3.2 ly). It is divided into two regions: a disc-shaped inner Oort cloud (or Hills cloud) and a spherical outer Oort cloud. Both regions lie beyond the heliosphere and in interstellar space. The Kuiper belt and the scattered disc, the other two reservoirs of trans-Neptunian objects, are less than one thousandth as far from the Sun as the Oort cloud.
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Title:
Oort Cloud, Illustration
Caption:
The Oort cloud, named after the Dutch astronomer Jan Oort, sometimes called the Opik-Oort cloud, is a theoretical cloud of predominantly icy planetesimals believed to surround the Sun to as far as somewhere between 50,000 and 200,000 AU (0.8 and 3.2 ly). It is divided into two regions: a disc-shaped inner Oort cloud (or Hills cloud) and a spherical outer Oort cloud. Both regions lie beyond the heliosphere and in interstellar space. The Kuiper belt and the scattered disc, the other two reservoirs of trans-Neptunian objects, are less than one thousandth as far from the Sun as the Oort cloud.
Credit:
Album / Science Source / Spencer Sutton
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Image size:
3218 x 3216 px | 29.6 MB
Print size:
27.2 x 27.2 cm | 10.7 x 10.7 in (300 dpi)
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