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

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

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

The newly discovered object, named 2017 OF201, has a 25,000-year orbit and is believed to be a large contender for dwarf ...

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be ...

And so this argument, I think that doesn't hold much water. So classification wise, I am completely comfortable calling Pluto a planet, the moon a planet. BARBER: Europa, one of Jupiter's moons ...

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 was a victim of its location ... dozens of different kinds of beetles," van Belle said. "Why not several classifications of planets?" For those who insist the Big 8 belong in a class ...