Our solar system may have hosted up to six giant planets in its first hundred million years, a new study suggests. The ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming ...

Astronomers have revealed new research showing that millions of new solar system objects are likely to be detected by a brand-new facility, which is expected to come online later this year.

(Ianm35/iStock/Getty Images Plus) The Solar System is one of the comforting constants of human existence. No matter what else ...

"It's remarkable what we've been able to learn about the orbits of planets around other stars using the Kepler Space Telescope," Petigura said. "The telescope was named after Johannes Kepler, who, ...

Add Yahoo as a preferred source to see more of our stories on Google. Jupiter is already the biggest planet by far in our solar system, but new research suggests it was somehow once even larger than ...

The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...

Scientists are actively searching for exoplanets, planets beyond our solar system, that might harbor life. Using advanced telescopes and methods like the transit and radial velocity techniques, they ...

MIAMI — NASA celebrated a key triumph on Tuesday as its $1.1 billion Juno spacecraft successfully slipped into orbit around Jupiter on a mission to probe the origin of the solar system. NASA’s Jet ...