New 3I/ATLAS images from NASA and the ESA suggest the interstellar comet is active as it approaches Earth in December.

In a cosmic spectacle that has astronomers buzzing, the interstellar comet 3I/ATLAS streaks through our solar system, its ...

Fleets of satellites interfere with snapshots taken by Earth-bound observatories. But a new study suggests these orbiters ...

Light pollution from the exploding number of satellites orbiting Earth is making it harder to peer into space.

Scientists using the Hubble Space Telescope have measured the size of a small exoplanet just 22 light years away, confirming that it’s the closest known Earth-sized world to our solar system to ...

Taking advantage of a total lunar eclipse, astronomers using NASA's Hubble Space Telescope have detected Earth's own brand of sunscreen - ozone - in our atmosphere. This method simulates how ...

Although astronomers have now discovered more than 5,000 exoplanets, or planets outside of the solar system, the large majority of these planets are considerably larger than Earth. That’s partly ...