Coustenis noted that U.S. President Trump's budget request to Congress does not support NASA's Mars Sample Return (MSR) ...

If Duffy is serious about his stated objective, then he and the president must work more effectively to integrate SpaceX and other private space startups more fully into NASA.

A million-light-year bridge of stars links merging galaxies in Abell 3667. This optical evidence confirms a cosmic collision.

The Perseid Meteor Shower is one of the brightest and most easily viewed meteor showers of the year, producing up to 100 ...

The annual meteor shower is usually easiest to catch just before dawn when they're appearing in the darkest part of the night ...