How can we use light to learn about the universe? How can we measure the properties of planets, stars, and galaxies? How can we explore our cosmic origins and the history of the universe? This course ...

The online course offers college credits and has four world-renowned scientists as its instructors. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

THIS book is intended for use as a text in introductory college courses in astronomy. It covers a very wide field, but the subject is so large that, in spite of the considerable size of the volume, ...