The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners of the universe, others right here on Earth.

Our Solar System is simple—one star, planets orbiting around it. But what happens in a system with multiple stars? Scientists ...

James Webb Space Telescope captures HH 30’s disc, revealing dust movement, jets, and planetary formation processes.

The mystery arose more than 20 years ago, when the Hubble Space Telescope spotted the universe's oldest known planet, which formed earlier in the universe's history than scientists thought was ...