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 ...

We’re in the throes of a deadly pandemic, and there’s not much time before everyone’s expected to get back to school. That’s why it’s fortunate that home-learning startup Outlier.org is adding two ...

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, ...