For the past 60 years, Earth has had a secret companion in space—a quasi-moon that has been sharing our planet’s orbit around ...

Earth has picked up a new traveling companion – an asteroid named 2025 PN7 that now moves through space in step with us. This ...

It's been one Neptunian year—or about 165 Earth years—since astronomers first observed the most distant planet from the sun.

In a surprising twist to our understanding of exoplanetary systems, astronomers have uncovered three Earth-sized planets ...

"If our solar system is indeed moving this fast, we need to question fundamental assumptions about the large-scale structure ...

The asteroids are as large as around 75 and 91 feet in diameter, according to the Center for Near Earth Object Studies.