Listoids,
"A planet four times the size of Earth may be
skirting the edges of the solar system beyond
Pluto, according to new research. Too distant
to be easily spotted by Earth-based telescopes,
the unseen planet could be gravitationally
tugging on small icy objects past Neptune,
helping explain the mystery of those objects'
peculiar orbits."
In particular, the hypothesized planet accounts
for the orbits of the SDO's (Scattered Disc Objects),
the biggest of which is Sedna. Other astronomers
say the math is sound, but the test is to look for it.
This method, in the past, resulted in the discovery
of Neptune and Pluto, so stay tuned.
Same article in these tow places:
http://www.space.com/15822-planet-edge-solar-system.html
or
http://www.huffingtonpost.com/2012/05/22/planet-x-odd-orbits-solar-system_n_1537043.html
Sterling K. Webb
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