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

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.

A distant world with carbon in its atmosphere and extraordinarily high temperatures is unlike any other planet we’ve seen, ...

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

Astronomers on Mauna Kea found the first space object on which NASA’s Roman Space Telescope can test its imaging technology.

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 ...