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Oort Limit
The outer boundary of the Oort Cloud and, as such, the furthest frontier of the Sun's domain. It is thought to lie at a heliocentric distance of about 100,000 astronomical units (15 trillion km, 9 trillion miles), or more than one third of the distance to the nearest star.
Related category
• COMETSAlso on this site:
Encyclopedia of Alternative Energy & Sustainable Living
Encyclopedia of History