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

Europe has committed to becoming climate-neutral by 2050. But how can we get there in a way that's technically feasible, economically responsible, and fair to all member states? Researchers from ...

NASA telescopes in Chile have discovered a comet from interstellar space, making its closest approach in October.

A possible cousin of Pluto seems to be circling the far reaches of the solar system. The dwarf planet candidate 2017 OF201 travels in a superwide orbit, with the sun relatively near one end of its ...

A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. The exoplanet, which is about 120 light years away, appears to take an unusual path ...

A new large object, 2017 OF201, was discovered far beyond Neptune. Its orbit is extremely elongated and takes 25,000 years to complete. 2017 OF201's size challenges ideas about a ninth planet in ...

If there were one, that Planet Nine would "nudge the closest part of 2017 OF201's trajectory inward until Neptune flung it out of the solar system." Because 2017 OF201 is there, that could be an ...