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 ...

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 ...

For this week’s Crash Course Astronomy episode, we take a skidding halt at the edge of the planetary solar system and scream back inward to the vast space between Mars and Jupiter. Before I go on, I ...

When it comes to exciting solar system exploration right now, comets are right there at the top. With Rosetta orbiting the comet 67P for nearly a year now, and hearing once again from the nearly-lost ...

Hank squares off against Crash Course Astronomy host Phil Plait in our special Valentine’s/Old Timey Medicine edition of ...

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 ...

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 ...