Cosmic Queries – Navigating the Cosmos
StarTalk Radio
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The Importance of Precision in Astrophysics
Patreon question: How does the phenomenon of a zerud versus actual position come into play for astrophysics like communication with deep space probes. When we see Mars in the night sky, we're actually seeing the light reflecting off of Mars where it was about three minutes ago. We are on the same side of the sun as Mars sometimes and that takes longer than other times.
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