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'Planet Y' theory hints at hidden Earth-size world lurking in the solar system — and it could be much closer to us than 'Planet Nine'
A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...
On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by the vote of the International Astronomical Union, which declared that Pluto, considered the ...
A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...
NASA unveiled the result of the research that analyzed over 40 years worth of old satellite data to add more into the ninth ...
Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...
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