How? I’m glad I asked … because now I can answer, in this week’s episode of Crash Course Astronomy! It’s always a good day when I can squeeze in a Fonzie reference. And poke fun at Star Wars.

Today Phil talks about distances, going back to early astronomy. Ancient Greeks were able to find the size of the Earth, and from that the distance to and the sizes of the Moon and Sun.

Along with Crash Course Astronomy, there’s going to be a new U.S. government series hosted by Craig Benzine (aka WheezyWaiter).

Today on Crash Course Astronomy, Phil dives into some very dark matters. Today on Crash Course Astronomy, Phil dives into some very dark matters. The stuff we can actually observe in the universe ...

It’s an example of an astronomical cycle visible to the naked eye, and the first of three subjects in Episode 3 of Crash Course Astronomy, a new series by Bad Astronomy’s Phil Plait.

“Crash Course” even has a science channel for kids that offers educational videos about subjects such as engineering, physics and astronomy. It has over 180 thousand subscribers and 100 videos.