Earth and Mars are constantly moving, but don’t stay a constant distance apart. Plus, spacecraft don’t travel in a straight line to their destination.

A new study shows that the event that wiped out the dinosaurs caused only a small drop in shark and ray species at the same ...

This faraway, ancient ball of stars may have been captured from another galaxy that passed too close to the Milky Way.

Artemis 2 will use the SLS to send a crew of four aboard an Orion spacecraft on a 10-day mission looping within 4,600 miles (7,400 km) of the Moon. The crew consists of Commander Reid Wiseman, Pilot ...

The bright star Sirius dominates the southern sky late this evening, blazing high in the south around 10 P.M. local time. You can use this sparkling star to point your way to the open cluster M47 in ...

A few days ago, longtime Astronomy magazine contributor Chris Schur sent me the image you see here. It shows the famous Double Cluster in Perseus, also known as NGC 869 and NGC 884. Most images of ...

Michael has been fascinated with the stars all his life. His astronomical journey began in third grade, after his parents bought him a set of constellation flash cards. From that day forward, ...

Commissioned with observing high-energy events, particularly solar flares, the High-Energy Solar Spectroscopic Imager (later renamed the Reuven Ramaty High-Energy Solar Spectroscopic Imager; RHESSI) ...