As our biggest planet, Jupiter's immense presence helps to hold our solar system together. Its massive size and gravitational ...

Astronomers using the NASA/ESA/CSA James Webb Space Telescope have for the first time identified hydrogen sulfide gas in the atmospheres of three gas-giant exoplanets orbiting HR 8799, a ...

The measurements from NASA's Juno orbiter mark the first time that the size and shape of Jupiter has been evaluated in more than fifty years. NASA's Pioneer and Voyager missions made observations of ...

The updated measurements won't take away Jupiter's status as the solar system's biggest planet. NASA / JPL-Caltech / SwRI / MSSS Scientists may have been overestimating the size of the solar system’s ...

From dazzling Jupiter high in the evening sky to elusive Mercury low at sunset, February 2026 offers one of the year's best planetary lineups. When you purchase through links on our site, we may earn ...

The solar system’s most giant planet is slightly less of a giant than scientists once thought. Jupiter, a world that is so huge that it could hold 1,000 Earths, is eight kilometers narrower in width ...

Over the years, passing spacecraft have observed mystifying weather patterns at the poles of Jupiter and Saturn. The two planets host very different types of polar vortices, which are huge atmospheric ...

Spectacular clouds swirl across the surface of Jupiter. These clouds contain water, just like Earth's, but are much denser on the gas giant—so thick that no spacecraft has been able to measure exactly ...

Spectacular clouds swirl across the surface of Jupiter. These clouds contain water, just like Earth’s, but are much denser on the gas giant—so thick that no spacecraft has been able to measure exactly ...

Jupiter reaches opposition on Jan. 10, but it provides a good sky show through the entire month. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.