Where does the solar system end and interstellar space begin? That's a question scientists have been working to answer using ...

A Jupiter-size exoplanet orbiting a dead star baffled astronomers. But the planet named WD 1856 b could preview the fate of ...

For obvious reasons, the Sun’s influence weakens as you get closer to the edge of the solar system. But things might be a lot ...

The planet should not have survived the star's red giant phase—which sees a star balloon to more than 100 times its original ...

Space looks empty until you try to cross it. Far beyond Pluto, where sunlight is faint and the planets are long behind, ...

Researchers have discovered a planet which, by all intents and purposes, should not be there. The world, coined WD 1856 b, is slightly larger than Jupiter and circles a dead star only about the size ...

During last year’s brief visit from the comet 3I/ATLAS, astronomers got an extremely rare glimpse into the cosmos beyond our ...

As the United States prepares to celebrate its 250th anniversary, the history of the solar system tells its own story of ...

Scientists used the James Webb Space Telescope to study interstellar comet 3I/ATLAS after its 2025 pass around the Sun.

Interstellar comet 3I/ATLAS carries isotopic ratios entirely outside the Solar System range, ESO’s Very Large Telescope has ...