Solving a lunar mystery? Scientist at the University of Arizona is the lead author on research proposing a new theory for the moon's unlikely origins.

The rings of Saturn are among the wonders of our solar system, with a diameter of roughly 175,000 miles (280,000 kilometers) as they encircle the giant planet. But smaller celestial bodies in the ...

In Sunday morning’s pre-dawn sky, you’ll see a very thin waning crescent moon right next to brilliant Venus. The moon will be ...

Eight planets travel in circular paths around a burning ball of gases, called the Sun. Welcome to our Solar System, our space ...