These are the best beginner binoculars you can buy in every category, from the best overall and the best for stargazing to the best budget model.

The sharpest images ever captured of the sun reveal intricate magnetic structures dancing across its surface.

The solar system's largest and smallest planets will greet one another in the eastern sky.

The Mars Express probe captured a striking new view of a Martian crater that holds clues to the planet's dynamic history spanning billions of years.

The vast, seemingly empty spaces between galaxies are not entirely empty. So what's in these cosmic voids?

American astronaut Norman E. Thagard broke NASA's space endurance record on June 6, 1995, , spending over 80 days on the Russian space station Mir.