So many people have difficulty understanding that we're seeing the light from a distant star. The light in the room right now is not now's light. It was light cast off at a predictable time in the past. We will see now's light a predictable time in the future.
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First parsed this as "Strossian astronomy" and thought of
@cstross's book Iron Sunrise, which also made sense in context.Thanks. Twitter will use this to make your timeline better. UndoUndo
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There are also light warping effects due to general relativity (e.g. gravitational lensing).
Thanks. Twitter will use this to make your timeline better. UndoUndo
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