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We can’t measure the distance to astronomical objects directly, so we have to be creative. That’s why we need the cosmic distance ladder. It’s a serious of techniques we use to calculate astronomical distances indirectly.
Nick Lucid - Host, Writer, Editor, Animator
Em Lucid - Producer
Nora Bailey - Researcher, Fact-Checker
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VIDEO ANNOTATIONS/CARDS
Black Hole Misconceptions:
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RELATED YOUTUBE VIDEOS
SciShow Space on Distance Ladder:
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SOURCES
Radar Ranging:
(73)90002-X
Parallax:
Cepheid Variables:
Type 1a Supernovas:
Cosmological:
~wright/
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LINKS TO COMMENTS
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IMAGE/VIDEO CREDITS
Apollo Retrorefector:
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Deep Field Flythrough:
Gaia Animation:
Milky Way (Artist Rendition):
Type 1a Supernova:
:
Barred Spiral Galaxy (NGC 1300):
Redshift Cube:
Redshift Zoom:
Galaxy GLASS-z12:
:
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TIME CODES
00:00 Cold Open
00:22 Introduction
02:05 Radar Ranging
04:17 Inverse Square Law
04:57 Stellar Parallax
08:46 Standard Candles
10:58 Cepheid Variable Stars
12:58 Type 1a Supernovas
15:15 Cosmological Redshift
18:37 Summary
19:44 Nebula Ad
20:52 Outro
21:05 Featured Comment
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