What made Sedna orbit in such a huge ellipse?

The non amateur stuff. Hawking, black holes, that sort of thing

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Richard McC
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What made Sedna orbit in such a huge ellipse?

Post by Richard McC »

Is it at all possible that there is a hoofing big brown dwarf or planetar lurking way out beyond Sedna, and that is what pulled Sedna (and Pluto for that matter) into their weird orbits.
Could this 'object' also have a 26'000 year orbit period. :roll:
Go placidly amidst the noise and haste, and remember what peace there is in silence....(and true darkness, without cloud cover).
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Sedna

Post by spawebmaster »

Latest idea I was reading this week was that far outer worlds like Sedna might have been captured by our sun from a passing star a few squillion years ago.
Richard McC
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Joined: Fri Dec 03, 2004 5:50 pm
Location: Outside Chester, United Kingdom
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Circular orbits

Post by Richard McC »

As an 'aside' from the Sedna question;
Why did Mercury (and all the other planets) not evolve into circular orbits.
We have after all had billions of years to do so....?
Go placidly amidst the noise and haste, and remember what peace there is in silence....(and true darkness, without cloud cover).
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