What i'm Scared Planet X Will be.. tardis.wikia.com/wiki/Mondas.. i understab the doctor who reference, but where does "planet X"come from?
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What i'm Scared Planet X Will be.

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Submitted: 12/13/2012
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User avatar #2 - gilliam (12/14/2012) [+] (5 replies)
i understab the doctor who reference, but where does "planet X"come from?
#3 to #2 - anonymous (12/14/2012) [-]
Before Pluto was discovered, scientists noticed that the outer gas giant planets' orbits didn't fit with Newton's laws, and attributed it to gravity from a further object then Neptune, whose gravity acted on the other planets, and named it Planet X. Pluto was thought to be Planet X, but its mass was to small to accommodate the shift in obits. Nowadays, astronomers think the large number of Kuiper Belt objects act on the outer planets' orbits, and that there is no Planet X
User avatar #1 - mads (12/14/2012) [-]
Planet X just doesn't exist like at all
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