Proxima Centauri, the sun’s nearest neighbor among the stars, is 25 trillion miles away from Earth. Even if it had a family of planets, no telescope could reveal them. According to Sir James Jeans, a ...

Jupiter is not just the oldest planet orbiting the sun—it’s also the largest. So when the young gas giant went on a rampage through the inner solar system, it shaped the fate of everything in its path ...

The hunt is on for Earthlike planets outside our solar system that may harbor life. Astronomer Geoff Marcy explains the challenges of finding infinitesimally small planets orbiting huge, very bright ...

"The speed at which this doomed stellar system is lurching wildly, likely due to the extreme brightness, is a frantic sign of ...

The hunt started when researchers spotted a young star about 375 light-years from Earth called PDS70. The disc of dust surrounding the star had a gap—a sign that planets might be carving out that ...

A stunning cosmic getaway is in store for residents of the United States on Friday evening as seven planets will align in a spectacular display — dubbed a planet parade — that can be seen without ...