Solar System and Oort Cloud (Oct 2023)
Solar System and Oort Cloud (Oct 2023)
The Oort cloud is a vast, spherical region of space thought to surround the Sun, with a radius
measured in thousands of astronomical units (1 AU being the Earth-Sun distance). Evidence for it
comes from the orbits of long-period comets, which seem to hail from a great distance from the Solar
System.
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