Add Yahoo as a preferred source to see more of our stories on Google. Fourth anniversaries aren’t often causes for celebration. But in the case of the James Webb Space Telescope (JWST), which launched ...

Planned launch of 500,000 satellites could spoil about one in three Hubble images, even when the telescope stays above Earth's weather.

A newly discovered galaxy with glowing star-filled "tentacles" is rewriting parts of cosmic history.

In order for NASA to study the mysteries of the universe, the scientists there need to be able to look out into the cosmos. The Hubble Space Telescope did this for a time, giving humanity some ...

A proposed five-satellite Cosmic Positioning System could measure cosmic distances directly and help address discrepancies in the Hubble constant through solar system–scale triangulation.

A NASA exhibit on the Hubble and Webb space telescopes opens at the Everhart Museum this week — the first space show since a moon rock was displayed for one week in 1970. “This is Smithsonian-level ...

The fate of a comet that was predicted to pass close to Earth remains a mystery five years after its dramatic breakup in the ...