I/ATLAS, the interstellar object discovered in 2025, reveals the estimated population, composition, and distribution of ...

On Jan. 15, 2025, the Gaia spacecraft took its last image. Then the craft ran a final round of engineering tests, fired its ...

Gaia data reveals signs of planets forming around young stars by measuring stellar motion, identifying planetary, brown dwarf, and stellar companions in early star systems ...

The interstellar visitor traces back to the Milky Way's violent heart. Discover the secrets of its 130,000mph galactic ...

Understanding how the Milky Way formed means looking far beyond the bright spiral you see in the night sky. A new study led ...

The Large Magellanic Cloud (LMC), one of the Milky Way’s closest companions, continues to astonish astronomers with its ...

The Milky Way was once a textbook example of how a spiral galaxy should form and evolve. Now a wave of new observations and ...

3I/ATLAS has now made its closest approach to the sun and Earth and is now heading back out toward the outer solar system. On ...

Astronomers believe the free-floating planet is around 22 percent the mass of Jupiter and lies 3,000 parsecs from the Milky ...

Dec. 19 (UPI) -- Comet 3I/ATLAS passed its nearest point to Earth early Friday and approaching within 168 million miles.

Not all planets are lucky enough to live in a neighborhood like our Solar System – some are doomed to roam the cosmos alone.

Just in time for Christmas, a vast star-forming region shaped like a Christmas tree is lighting up space 2,700 light-years from Earth.