Little is known about the long-destroyed moon-forming planet, Theia. But it may have been born in the inner solar system—just like Earth—a new study suggests ...

When a meteor streaks across the sky, it's not just beautiful. It's nature's way of delivering a time capsule to Earth.

Astronomers are just beginning to scratch the surface of the complex, and sometimes violent, relationships between planets ...

When most people think of astrology, they typically think of their zodiac sign, also known as their Sun sign—the one that ...

Scientists believe the moon was formed from the debris of a collision between Earth and the planet Theia, which was likely ...

From the earliest artificial satellites to today's sophisticated space telescopes and GPS constellations, these marvels of ...

Scientists believe the moon was formed from the debris of a collision between Earth and the planet Theia, which was likely located closer to the sun than Earth is now.

NASA unveiled close-up pictures on Wednesday of the interstellar comet that's making a quick one-and-done tour of the solar ...

Explore the vastness of the Solar System in this video, which accurately showcases the relative sizes of the planets and ...

For the first time, astronomers say they have spotted a giant explosion released by a star beyond our solar system.

Bundle up and blast off to the far reaches of our Solar System for Ice Giant Night at the historic Cincinnati Observatory.