Scientists have identified a rocky outer planet in a system where a gas giant was expected. The discovery challenges traditional models and supports the idea that planets may form one by one in ...

Space around the Sun contains far more than planets. Scattered through it are smaller bodies made of rock, metal, ice and ...

High-resolution flyover footage is revealing Mars as a world shaped by dramatic landscapes and ancient forces. From vast canyons to layered terrain carved by time, orbital cameras are capturing ...

This Ramadan, skywatchers in Dubai will have a rare chance to witness a spectacular planetary parade as six planets align ...

Astronomers have detected a smelly gas best known for the odor of rotten eggs—hydrogen sulfide—in the atmospheres of four giant planets far beyond our solar system. While the gas may be unpleasant on ...

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 ...

A distant star dimmed by 97% for nearly 200 days. Astronomers say giant rings around a brown dwarf or super-Jupiter may explain it.

In the eastern Utah desert, carbon-dioxide-saturated water bubbles, sprays and foams from the ground. These cold-water ...

For over a century, the world’s greatest minds could map the heavens, but not weigh the Earth. Newton’s theory had a missing number, and many believed it could never be found.

NASA describes deep hydrogen compression that eventually forms conductive metallic liquid, making Jupiter feel less like Earth and more like a continuous gradient of states. That alone breaks the old ...

The arrival of 3I/ATLAS in our solar system spawned multiple proposals for a rendezvous mission to study it up close. As the ...

Researchers detail a 2035 Solar Oberth maneuver mission using chemical propulsion to intercept interstellar comet 3I/ATLAS ...