There's a broad consensus in the scientific community that a follow-up mission to Pluto should be an orbiter, and not a ...

What if there’s a planet hiding in our solar system, 10 times larger than Earth? While this theory has yet to be confirmed, ...

NASA has uncovered a new ‘Super Earth’ planet just 154-lightyears away that has been flashing a mysterious signal. The planet ...

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

It took over nine years for New Horizons to reach Pluto after blasting off atop an Atlas 5 rocket on Jan. 19, 2006. After ...

Subaru Telescope has made an exciting discovery: a small body beyond Pluto, with implications for the formation, evolution, and current structure of ...

While for most people Pluto is the most distant planet in the Solar System, things get a lot more fuzzy once you pass Neptune ...

Pluto, the fourth ninth planet -- 11. Hidden secrets of the outer solar system -- 12. The plutinos -- 13. Is Pluto a planet? -- 14. Goldilocks -- Postscript. Current thoughts by other astronomers -- ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

The orbit of 2023 KQ14 (in red) compared to the orbits of the other three sednoids (in white). 2023 KQ14was discovered near its perihelion at a ...