New telescope could finally prove there is an elusive 'Planet X' in our solar system
There are eight official planets (sorry, Pluto) in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and ...
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Planet X: Could Solar System hide a mysterious giant?
A few decades ago, the Solar System had nine planets, but in 2006 the International Astronomical Union reclassified Pluto as ...
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We May Be on the Brink of Finding the Real Planet Nine
which is also referred to as Planet X. “Sedna was our first clue to Planet Nine, although we didn’t recognize it at the time,” Brown says. Sedna and 2012 VP 113 (along with a few other ...