Scientists studying a young system around a Sun-like star think exocomets could be ferrying water.

A 24-year-old observatory assistant from the Midwest discovered Pluto. Clyde Tombaugh, born in 1906 in Streator, Illinois, grew up fascinated with the solar system. A self-taught astronomer, he built ...

For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar system. Now, a team of researchers have taken a completely different approach to ...

A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet, the object is only the third celestial ...

Over the past three decades, computer models of planetary system formation have gone from fairly crude representations to sophisticated simulations using thousands of different starting points. A ...