Hypothetical Planets

Throughout history, astronomers have observed heavenly bodies or some evidence of them that later “vanished”. Or did they? Hypothetical planets include:
* Vulcan, the intra-Mercurial planet
* Mercury's Moon
* Neith, the Moon of Venus
* The Earth's Second Moon
* The Moons of Mars
* The 14th Moon of Jupiter
* Saturn's Ninth and Tenth Moons
* Six Moons of Uranus
* Planet X
* Nemesis, the Sun's companion star
* References

Each has a story. Link -via Dark Roasted Blend

(image credit: NASA)

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you know, if you shrunk the solar system down to scale with Pluto touching your toes and Mercury at the top of your head, Uranus is exactly where you'd think it would be.
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