Season
- Season 0 2017-04-10
- Season 1 2015-02-11
- Season 2015 2015-02-11
- Season 2016 2016-01-06
- Season 2017 2017-01-04
- Season 2018 2018-01-10
- Season 2019 2019-01-09
- Season 2020 2020-01-06
- Season 2021 2021-01-12
- Season 2022 2022-01-12
- Season 2023 2023-01-11
- Season 2024 2024-01-10
- Season 2025 2025-01-16
- Season 2026 2026-01-13
Season 2026 Episode
- Season 2015 Episode 1
- Season 2015 Episode 2
- Season 2015 Episode 3
- Season 2015 Episode 4
- Season 2015 Episode 5
- Season 2015 Episode 6
- Season 2015 Episode 7
- Season 2015 Episode 8
- Season 2015 Episode 9
- Season 2015 Episode 10
- Season 2015 Episode 11
- Season 2015 Episode 12
- Season 2015 Episode 13
- Season 2015 Episode 14
- Season 2015 Episode 15
- Season 2015 Episode 16
- Season 2015 Episode 17
- Season 2015 Episode 18
- Season 2015 Episode 19
- Season 2015 Episode 20
- Season 2015 Episode 21
- Season 2015 Episode 22
- Season 2015 Episode 23
- Season 2015 Episode 24
- Season 2015 Episode 25
- Season 2015 Episode 26
- Season 2015 Episode 27
- Season 2015 Episode 28
- Season 2015 Episode 29
- Season 2015 Episode 30
- Season 2015 Episode 31
- Season 2015 Episode 32
- Season 2015 Episode 33
- Season 2015 Episode 34
- Season 2015 Episode 35
- Season 2015 Episode 36
- Season 2015 Episode 37
- Season 2015 Episode 38
- Season 2015 Episode 39
- Season 2015 Episode 40
- Season 2015 Episode 41
- Season 2015 Episode 42
- Season 2015 Episode 43
PBS Space Time - Season 2015 Episode 7 Cosmic Microwave Background Explained
10.00 48 minutes HAS SPACE ALWAYS BEEN BLACK? As long as we've been around, YES. But the universe gets much more exciting, AND much BRIGHTER, as we start winding our clocks back to the early days of the universe. Near the beginning of the universe, when space was rapidly expanding, that dark night sky we know so well as actually…ORANGE! But why? Did the lights just go out, or did something more spectacular happen?
