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 ...

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 article recounts the author's personal journey into astronomy, highlighting several influential beginner astronomy guidebooks from various eras, including "Stars: A Guide to the Constellations," ...

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 ...