Here are our picks for the most amazing space photos of the week.
The U.S. Air Force must change the way it does business to fight the growing threat to the nation's dominance of the final frontier, military officials say.
Humans have questions about alien life. But those beings, if they exist, likely have some questions of their own about humans, queries we may want to answer before we find any life beyond Earth.
Near the edge of Jamaica Bay in New York City, about a dozen people gathered to watch Mercury travel across the sun.
A bright fireball meteor streaked across the night sky above Missouri Monday (Nov. 11), passing over St. Louis' iconic Gateway Arch.