The Case of the Missing Matter "We robustly show that the gas is much more extended than the dark matter" relative to ...

Astronomers may have found the long-missing half of the universe's regular matter—and it appears to have been right under our ...

NASA/ESA Hubble Space Telescope, Gemini North telescope and NASA Infrared Telescope Facility observations of Neptune and Uranus may have revealed why they differ in color. Credit: Directed by: Bethany ...

Half of the universe's hydrogen has been missing since the Big Bang 13.8 billion years ago, but scientists reckon they've ...

A new idea about cosmic expansion has emerged that might remove the need for dark matter and dark energy altogether.

Explore NASA’s top 10 rare and stunning galaxy images, showcasing vibrant interactions, cosmic collisions, and star-forming wonders that highlight the universe’s dynamic beauty.