And at night, there are familiar constellations, planets, the odd meteor or two, and satellites streaming overhead. These are all fun to see with your unaided eyes. But there are times when a little ...

Phil takes a look at the explosive history of our cosmic backyard. In today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a ...

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 ...

I am extremely pleased and excited to announce that the online video series I’m doing, Crash Course Astronomy, premieres next Thursday, Jan. 15, one week from today! The weekly series, done under the ...

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 ...