The Sky at Night - Season 9 Episode 6 : How Long is a Day?
Your monthly journey through the fascinating world of space and astronomy with the latest thinking on what's out there in space and what you can see in the night sky.
First Air Date : Apr 24, 1957
Last Air Date : Aug 15, 2025
Runtime : 30 min.
Genre : Documentary, News
Stars :
Quality : 
- Eps. 1 : Unwelcome Atmosphere1965-01-15
- Eps. 2 : Up in a Balloon1965-02-12
- Eps. 3 : Lava or Dust?1965-03-12
- Eps. 4 : Ancient Lore1965-04-02
- Eps. 5 : Naked Eye Astronomy1965-04-30
- Eps. 6 : How Long is a Day?1965-06-04
- Eps. 7 : Space Weather1965-06-25
- Eps. 9 : Mars in Shot1965-08-20
- Eps. 10 : Re-thinking the Universe1965-09-17
- Eps. 11 : Ninety-Eight Inches1965-10-08
- Eps. 12 : The Unsteady Universe1965-11-05
- Eps. 13 : The Extra Planet1965-12-03
