Phil gives the course a send off with a look at some of his favorite topics. Here it is, folks: the end. In our final episode of Crash Course Astronomy, Phil gives the course a send off with a look at ...

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 ...

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 ...

Astronomy isn’t just for “Big Bang Theory” enthusiasts. But unfortunately, so many of us take for granted the endless swath of protection and ever-changing colors and shapes over our heads, until ...

Against all odds, this new show is going to make you love physics. After the Green brothers ended their much-beloved Crash Course Astronomy series in January, fans wondered what subject the duo would ...

Forty-eight episodes, more than eight hours of content, 100,000 words, a year and a half of work, topics ranging from quantum fluctuations to the death of the Universe, and 12 million views … finally, ...