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If you live in Los Angeles (around 33°52'N, roughly the latitude of Hermosa Beach) the black hole in V404 Cygni passes over you each day. On Christmas Day it will be directly overhead around 2pm.
this post was submitted on 01 Nov 2023
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Imagine growing up on a tidally locked world, living in the day, until you wander off for long enough to discover the night.
What a terrifying thought! I imagine there's some other sapient race out there that has experienced that.
Now think about the kinds of predators that evolved in constant night, which those people found while exploring the darkness. Then they develop telescopes and discover other worlds on which the night moves...
There's an old Roger Zelazny story with that exact premise called Jack of Shadows