This seems midly relevant, speaking of the visibility of things: https://en.wikipedia.org/wiki/One-way_speed_of_light https://en.wikipedia.org/wiki/One-way_spe

This seems midly relevant, speaking of the visibility of things: https://en.wikipedia.org/wiki/One-way_speed_of_light https://en.wikipedia.org/wiki/One-way_speed_of_light