![The Planets](https://image.tmdb.org/t/p/w342/oA0MnA2KMbWIWM03Jis0t8oCdW0.jpg)
1 Season
5 Episode
The Planets - Season 1 Episode 2 The Two Sisters - Earth & Mars
Professor Brian Cox continues his tour of the solar system revealing that it was once home to not one, but two blue planets.
- Year: 2019
- Country: United Kingdom
- Genre: Documentary
- Studio: BBC Two
- Keyword: space, astronomy, solar system
- Director:
- Cast: Brian Cox