posted on Dec, 12 2012 @ 10:59 AM
reply to post by BrieBird
First of all, Tyche was not hypothesized to be a dark star; the hypothesized mass is not great enough. The hypothetical Tyche is thought to be a gas
giant up too four times the mass of Jupiter (which is still not massive enough to be a brown dwarf star).
Secondly, Pluto and Sedna do NOT need another body keeping them the solar system. Pluto's orbit is well-understood. Sedna does indeed have an
unusually wide elliptical orbit, but there are other explanations other than "a brown dwarf" for that unusual orbit...
..Sedna's orbit could also be explained by the presence of Jupiter and Saturn giving Sedna (which once may have been closer to the Sun in a less
elliptical orbit) a gravitational push out into its present orbit. Orbital calculations have been done that explain this push by Jupiter and
As for Tyche...
The main reason the scientists who hypothesized Tyche think it may exist is because of a slight bias in the origin of comets from a region of the
outer solar system. They hypothesize that this potential gas giant planet is perturbing a portion of the Oort cloud, causing this bias in the
population of comets.
Data from the WISE telescope may give some clues as to the possible existence of Tyche, but the analysis of such data could take years.
edit on 12/12/2012 by Soylent Green Is People because: (no reason given)