For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

Some scientists hypothesize that a mysterious, gigantic 9th planet may be lurking at our solar system’s edge. Why haven't we ...

Shares of Planet Labs ( PL 11.24%) climbed on Thursday, closing up 11.2% as of the 1 p.m. ET early market close for the ...

Planet X, also called Planet Nine, is a hypothetical planetary body seven times the mass of Earth lurking behind Pluto. If found, this gassy, icy beast some 155 billion miles away from the Sun ...

Despite this, "people have considered a whole host of different orbits for these hypothetical planets," Chad Trujillo, an astronomer at Northern Arizona University, said to Science News. "This object ...

Cities have a central role to play tackling climate change. They contribute 67%–72% of the greenhouse gas emissions which are ...

Today, the Planet X hypothesis is largely considered to be discredited. However, that hasn't stopped astronomers from looking for planets in the far reaches of the solar system.

Planet-X will also be participating in the widely successful Xai Vanguard: Genesis campaign this year. The Xai Foundation, a core contributor to the gaming-centric blockchain network, ...

To get a glimpse of the “Swift Planet,” EarthSky suggests waiting for the sun to set before looking west for the planet ...

New research shows there is at least a 40% chance of the existence of Planet Nine, but scientists are still looking for definitive proof.

Charles Leclerc let fly an untelevised, X-rated radio rant after qualifying in sixth for the British Grand Prix.