Trans-Neptunian Region
The area beyond Neptune, or the "trans-Neptunian region", is still largely unexplored. It appears to consist overwhelmingly of small worlds (the largest having a diameter only a fifth that of the Earth and a mass far smaller than that of the Moon) composed mainly of rock and ice. This region is sometimes known as the "outer Solar System", though others use that term to mean the region beyond the asteroid belt.
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Famous quotes containing the word region:
“Death is only a launching into the region of the strange Untried; it is but the first salutation to the possibilities of the immense Remote, the Wild, the Watery, the Unshored.”
—Herman Melville (1819–1891)