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There may be another world lurking between the orbital lines of our solar system. Astronomers in Japan have published their theory of an “Earth-like planet,” dubbed Planet Nine, that’s hiding in plain ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

Nasa continues to find worlds that exist far beyond our Solar System. And now, the American space agency has confirmed the discovery of exoplanet number 6,000! An exoplanet is a planet that orbits a ...