Astronomy is weird. Everything we study is really, really far away. So far away really, that for most of history we didn’t know how far away they were. It was impossible to measure. But then some ...

I’ve been hinting for some time about a secret project I’ve been working on, and the time has finally come to announce it: I’m writing and hosting an online astronomy video series! The series will air ...

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 ...

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 ...

Before moving on from Jupiter, we're going to linger for a moment on the planet's moons. Before moving on from Jupiter to Saturn, we're going to linger for a moment on Jupiter's moons. There are 67 ...