space knowledge
3 videos • 1 views • by andrometocs
1
Understanding Astronomical Unit and Light Year | Units to measure very large distances.
The Practical School
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2
Light seconds, light years, light centuries: How to measure extreme distances - Yuan-Sen Ting
TED-Ed
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3
Michio Kaku: 3 mind-blowing predictions about the future | Big Think
Big Think
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