rawbone8 said:Thanks big dirigible. I know I am out of my depth here, so your help and clarification is welcome. BTW I was attempting to use (misuse?) the term "eccentric" metaphorically, referring to the oddness of Pluto. If I'm not mistaken, doesn't Pluto have a very eccentric orbit coming really close to the sun? My memories of high school physics are pretty fuzzy, but I thought that it orbits in a different direction than most of the other planets.
The orbit of Pluto doesn't get real close to the sun by any means, but it gets well inside the orbit of Neptune at times, and thereby closer to the sun than Neptune. Uranus probably has the most eccentric orbit in that its' axis tilts very strongly so that it always has one of the poles directed towards the sun.
On the other hand, the hypotethical planet X is supposed to orbit real close to Earth (and orbiting far out towards Sirius on the other extreme).
- Possibly, the Plutolings are gonna get a good giggle when planet X come back to say hello, in a millennium or so, and - supposedly - seriously upsetting the Earths' orbit. :biggrin1:
I am not planning to stay around here long enough to get to know if it's true.