
The Earth: Crash Course Astronomy #11
Phil starts the planet-by-planet tour of the solar system right here at home, Earth.
Phil starts the planet-by-planet tour of the solar system right here at home, Earth.
Phil gives the course a send off with a look at some of his favorite topics.
Our Universe’s days are numbered.
Thanks to the wonders of physics, we can map a timeline of the universe’s history.