Astronomy isn't just about gazing at stars, it's about understanding the invisible forces that govern everything from planetary motion to the expansion of the universe. Behind every orbit, black hole, ...

Add Yahoo as a preferred source to see more of our stories on Google. Think you know when the next total solar eclipse will grace American skies? Test your astronomy knowledge with this celestial ...

Think you know when the next total solar eclipse will grace American skies? Test your astronomy knowledge with this celestial trivia question about the next total solar eclipse visible from the ...