One of the main objectives of the Hubble Space Telescope, launched in 1990, was to measure the size and age of the Universe, ...

A newly discovered ice comet from deep space may be over 7 billion years old, making it the most ancient comet scientists ...

Now imagine that this enormous mirror is made not of precisely manufactured glass segments, but of liquid floating in space.

The most powerful telescope ever launched into space uncovered a cluster of forming stars within the "toe beans" of the Cat's ...

Greetings, stargazers. Emission nebulae are the subject of many of the most spectacular astrophotographs published in the last decade. Although there are many subcategories of nebulae, they all ...

A mystery interstellar object discovered last week is likely to be the oldest comet ever seen – possibly predating our solar system by more than three billion years, researchers say. The "water ...

New research has revealed everything astronomers currently know about the mysterious interstellar object 3I/ATLAS.

Kluger, who has written about the Apollo Program, talks about his new book: 'Gemini: Stepping Stone to the Moon, The Untold ...

Tony Tyson’s cameras revealed the universe’s dark contents. Now, with the Rubin Observatory’s 3.2-billion-pixel camera, he’s ...

The Smithsonian Institution is fighting efforts by Texas lawmakers to relocate the retired space shuttle Discovery from ...

On July 11, 2022, the James Webb Space Telescope finished its commissioning and commenced science operations. In the three ...

A newly discovered comet, 3I/ATLAS, may be the most ancient visitor ever detected, potentially older than our solar system itself. Unlike previous interstellar objects, this ice-rich comet seems to ...