On February 23, 1990, NASA's Pioneer 11 spacecraft left the solar system! This was the second spacecraft to travel beyond the planetary part of our solar system, which ends at Neptune's orbit. An ...

Harvard scientist Avi Loeb suggests comet 3I/ATLAS may be an alien vessel seeding life, after NASA's SPHEREx spacecraft detected unexplained methane and organic chemicals on board.

It did not subside after the nearest approach of Comet 3I/ATLAS to the Sun; it became bright once more. The delay of that ...

Gas giants are massive worlds made mostly of hydrogen and helium. They lack solid surfaces, and in our solar system, Jupiter ...

Is 3I/ATLAS just a comet — or an intergalactic ark? A NASA spacecraft has discovered organic chemicals on 3I/ATLAS, which ...

They’re real, but I haven’t seen them, and they’re not being kept in… what is it? Area 51,” he quipped.Within hours, the clip ...

Scientists have discovered something that they previously thought wasn’t possible – an ‘inside out’ star system. When you ...

'Hang onto your hats.' ...

SHOCKED astronomers have spotted a “rogue” planet that defies historic theories. A unique “inside out” planetary system with a distant rocky world turns our ...

Arc System Works has announced Donutal, an alien interrogation adventure game where “conversation” is your only weapon. It will launch for PC via Steam in 2026. A demo is available now.

By Will Dunham WASHINGTON, Feb 14 (Reuters) - Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that formed beyond the orbits of its ...

A new paper in Monthly Notices of the Royal Astronomical Society argues the simplest answer may work: contact binaries like ...