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A comment on Light - If you view the Earth from far enough away can you observe its past?. Parent comment
To understand why picture the triangle between the start point (A), end point (B) and the moon (M). The distance AMB is larger than AB.
Google or Wikipedia 'light cone', pretty interesting stuff.
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To understand why picture the triangle between the start point (A), end point (B) and the moon (M). The distance AMB is larger than AB.
Google or Wikipedia 'light cone', pretty interesting stuff.