Astronomers have mapped the 3D structure of an alien planet's atmosphere for the first time, revealing a layered system of extreme winds.

The head of planetary defense at the European Space Agency discusses 2024 YR4, an asteroid with a small chance of striking ...

New research suggests that dark energy isn't needed to explain the acceleration in the expansion of the universe — instead ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more.(CNN) — A recently ...

Two weeks ago, when Ars first wrote about the asteroid, designated 2024 YR4, NASA's Center for Near Earth Object Studies ...

IT starts with a glimmer in the sky – just a pinprick of light, barely distinguishable from the stars. But this is no distant celestial body – this is a massive 2,560-foot-wide ...

The likelihood of 2024 YR4 colliding with the our planet in 2032 have ticked up to over 3 percent. Is it time to start ...

Saturn’s rings are an arresting sight even through modest telescopes. The planet is made mostly of hydrogen and helium whereas the rings are billions of pieces of mostly bright-white water ice and ...

A vast construction site southwest of Beijing has drawn the scrutiny of U.S. intelligence services, which suspect that China ...

YR4 has a 2.3% chance of hitting Earth in the year 2032. But according to new estimates, it may have an even smaller chance ...

A massive 120-foot asteroid, named 2025 CY3, is set to make a close approach to Earth this weekend. Hurtling through space at ...