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.

Visible in Scorpius before dawn, our waning satellite is close to the 3rd-magnitude star Pi (π) Scorpii and less than 8° from Antares, the Scorpion’s bright red heart. The Moon will pass 0.7° south 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, ...

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