Add Yahoo as a preferred source to see more of our stories on Google. The Oort Cloud is home to countless frozen bodies that occasionally get knocked toward the inner solar system, becoming the comets ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Flybys of Jupiter ...

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 ...

Ever since the first explorers charted the outer reaches of our Solar System, its true boundaries have remained hazy. While the Voyager probes have gone far into interstellar space, our Sun’s ...

Here’s what you’ll learn when you read this story: More stable sunspots can possibly give more insight to the solar activity cycle, which is about 11 years long and peaks during a solar maximum.

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

A newly discovered interstellar comet is hurtling around us, only the third interloper object to be observed in our solar system. It is not expected to pose an impact risk to Earth, but telescopes ...

EVANSTON, Ill. — Except for the fact that we call it home, for centuries astronomers didn’t have any particular reason to believe that our solar system was anything special in the universe. But, ...

Flybys of Jupiter’s fiery moon Io, carried out by NASA’s Juno spacecraft, are helping to solve the enduring mystery of why the small moon is the most volcanically active body in our solar system.