Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about geologically active moons.

YSES-1b is even "weirder," said Nasedkin, one of the coauthors. Around it is a so-called circumplanetary dust disk that could serve as a birthplace for moons, similar to those seen around Jupiter.

Mercury reaches its greatest elongation, 26 degrees east of the sun on July 4. From latitude 40 degrees north, the ...

kilometers (124 miles) of Io in February, and transmitted them to Earth during the following eight months. To approach Io, the spacecraft had to enter a region of hazardous radiation around Jupiter.

On Sept. 7, Earth will be precisely between the sun and Saturn, with the ringed planet at its apparent biggest, brightest and best of the year. Any telescope will enable you to see its unique ring ...

Jupiter isn’t alone in this category; Saturn, Uranus, and Neptune are also gas giants, though Uranus and Neptune are often ...

The solar wind pushes some of the gas and dust away from the comet, forming those beautiful tails we see. A comet actually ...

The exoplanet, a planet beyond our solar system, has been dubbed TWA 7b after NASA's James Webb Space Telescope captured ...

Here’s how it works. On July 6, 1938, an American astronomer named Seth Barnes Nicholson discovered Jupiter's moon Lysithea.

Democracy Dies in Darkness Science See images from the Rubin telescope and world’s largest digital camera By Joel Achenbach June 23, 2025 at 1:26 p.m. EDTToday at 1:26 p.m. EDT ...

Perched atop Cerro Pachón in Chile, the newly-commissioned Vera C. Rubin Observatory has released some highly exciting first images that offer a stunning preview of its unprecedented capabilities.