Neptune - Neptune
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Q: what do you know about Inner Oort cloud ?
| Option | Answer | Is Correct |
|---|---|---|
| 1 | 90377 Sedna is a large, reddish Pluto-like object with a gigantic, highly elliptical orbit that takes it from about 76 AU at perihelion to 928 AU at aphelion and takes 12,050 years to complete. Mike Brown, who discovered the object in 2003, asserts that it cannot be part of the scattered disc or the Kuiper Belt as its perihelion is too distant to have been affected by Neptune’s migration. I and other astronomers consider it to be the first in an entirely new population, one which also may include the objects 2000 CR105, which has a perihelion of 45 AU, an aphelion of 415 AU, and an orbital period of 3420 years,and (87269) 2000 0067, which has a perihelion of 21 AU, an aphelion of over 1000 AU, and an orbital period of 12,705 years. Brown terms this population the “Inner Oort cloud,” as it may have formed through a similar process, although it is far closer to the Sun.Sedna is very likely a dwarf planet, though its shape has yet to be determined with certainty. |
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