The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact ...

Even the best telescopes can’t see exoplanets. It’s all about watching for jiggly stars, blue shifts, and transits.

Scientists using NASA's James Webb Space Telescope have observed a rare type of exoplanet, or planet outside our solar system ...

University of California, Irvine Generally, scientists agree that the chances of our planet being the only one in the ...

TRAPPIST-1e, an Earth-sized world in the system’s habitable zone, is drawing scientific attention as researchers hunt for ...

A new research paper, published in the Science Advances journal, has postulated that rocky planets like ours may be far more ...

The cold and remote planets originally earned their label of "ice giants" to contrast their interiors from those of Jupiter ...

After studying thousands of computer simulations of the solar system, researchers at Rice University and the Planetary Science Institute think there’s a 40% chance an elusive “Planet Nine” or “Planet ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. There’ s six-planet parade on Monday, Aug. 25, just before ...