You can probably imagine an early universe without planets or stars — but what did the universe look like before time existed? This fall, you could find out by taking a free class led by prominent ...

Astronomy professor Chris Impey's MOOC, or Massive Online Open Course, has already signed up more than 1,000 students and it recently got a shout-out from Sports Illustrated, which listed "free online ...

Welcome to the Department of Physics and Astronomy at the University of Delaware, where the pursuit of scientific discovery and innovation meets cutting-edge research and academic excellence. Our ...