For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar ...

Over the last few years, the term "Goldilocks zone" has come to be widely used to describe the range of distances from a star ...

Gravitational assists are an emblematic example of why space travel is hard —it is exactly rocket science, after all. Gravity ...

ESA’s Proba-3 mission has achieved a spacefaring marvel: two satellites flying in perfect formation to mimic total solar ...

New images are key to understanding solar magnetic storms and other space weather that can disrupt systems on Earth.

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds ...

The robotic Solar Orbiter spacecraft has obtained the first images ever taken of our sun’s two poles as scientists seek a ...

Astronomers have located a rare exoplanet on the edge of the Milky Way.

Moving from the outer layer inward, the first layer is the corona — the outermost part of the sun’s atmosphere that is ...

Located inside galaxies, these cosmic arrangements are made up of at least one star and all the objects that travel around it, including planets ... our solar system—that big ball of warmth ...

Dusty clouds made of sand—that may rain iron—blanket a giant planet orbiting a young, sun-like star just 310 light-years from Earth, the James Webb Space Telescope has revealed. The discovery was made ...

Welcome to the universe of parallel playgrounds—where seesaws hover in anti-gravity capsules, and jungle gyms coil like strands of DNA on planets unexplored.