![]() ![]() ![]() Starting from the moon, about one light-second away, to the sun (eight light-minutes), the farther planets (a few light-hours) and the nearest stars (a few light-years), all the way out to astronomical objects millions of light-years away. It started out promisingly, with Neil deGrasse Tyson explaining cosmic distance scales and how, when we look out into the universe, we’re looking backwards in time.
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