A powerful new tool comes online this year that could help astronomers locate the mysterious planet hiding somewhere beyond ...

A six-pack of planets will line up and light up the night sky this month, folks. Venus, Mars, Jupiter, Saturn, Uranus, and ...

The larger moons of Pluto and Earth likely formed through a collisional process with Charon and our moon, respectively, ...

Pluto may have got romantic to capture its largest moon, colliding and engaging in a passionate but icy 10 hour kiss with ...

A six-planet alignment or parade will form an arc in the early night sky, peaking in it's visibility Jan. 17-18. We let you ...

Billions of years ago, in the icy outskirts of the solar system, a dramatic collision forged the unusual pairing of Pluto and ...

Recent simulations link the creation of Pluto and its moon Charon to a colossal impact, akin to the Earth-Moon origin, ...