OK, over the past eight episodes of Crash Course Astronomy we’ve covered a lot of basics: What you can see, how you can see it, and how some basic forces sculpt what’s out there. So. What’s out there?

Active galaxies pour out lots of energy. Active galaxies pour out lots of energy, due to their central supermassive black holes gobbling down matter. Galaxies tend not to be loners, but instead exist ...

Now that we've finished our tour of the planets, we're headed back to the asteroid belt. Now that we've finished our tour of the planets, we're headed back to the asteroid belt. Asteroids are chunks ...

Throughout the year, as Earth progresses through its orbit around the sun, one can witness stars in the night sky rise and set at different times. It’s an example of an astronomical cycle visible to ...

One of my favorite things to do as a science communicator is melt peoples’ brains *. There isn’t a better playing field for that than cosmology, the study of the origin, structure, and fate of the ...

In 2011, brothers John and Hank Green created an educational YouTube channel called “Crash Course” with the goal of spreading high-quality educational videos for everyone, free of charge. A year later ...