Northrop Grumman and Firefly Aerospace have given a name to the future medium-lift rocket they plan to build: Eclipse.

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

On May 29, 1919, a total solar eclipse helped to prove Albert Einstein's theory of general relativity. Einstein's theory ...

Using a newly developed adaptive optics system called Cona, scientists peered through Earth's turbulent air to reveal the sun ...

Earlier this year, I went to Career Day at my older kid’s school. The experience was sometimes humbling — at an elementary ...