For centuries, astronomers have wondered whether planets similar to Earth orbit nearby stars. In the past three decades, advances in telescope technology and space-based observatories have transformed ...

This artist’s impression shows a view of the surface of the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the solar system. Credit: ESO/M. Kornmesser This artist’s ...

A cool interstellar comet that for millions of years has drifted in the spaces between our stars is now back in our telescope viewing range and will make its closest approach to Earth this week. We’re ...

Using NASA and other scientific sources, Stacker compiled a list of the 50 star systems closest to our sun. Explore these systems to learn what they can reveal about the universe and which ones might ...

Astronomers have confirmed more than five thousand planets orbiting stars beyond our solar system, yet the question that captures public imagination remains simple: how close is the nearest world that ...

The comet originated from outside our solar system and poses no danger to our planet. NASA officials have rejected theories that the object could be an alien spaceship. While not visible to the naked ...