Elon Musk, under the username "Kekius Maximus," has joined William Shatner in advocating for Pluto's reclassification as a planet. Shatner playfully suggested Musk persuade the President via executive ...

A recently discovered celestial body is rewriting our knowledge of the Kuiper Belt and maybe challenging the existence of the ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

Almost 20 years after Pluto was infamously downgraded from its status as a planet, scientists now believe they have ...

the International Astronomical Union stripped it of its original classification, after narrowing the definition of a planet to be one that clears its orbit with its gravitational heft. Pluto doesn ...

Pluto can be thought of as being part of a binary system with its biggest satellite, Charon (pictured). Scientists have long thought that this system formed as the result of a collision between ...