Go lookup CANDU reactors, we have designs already that can’t steam explode themselves and instead will fail safe. Also just to be clear nuclear reactors don’t perform a nuclear explosion if they fail, the Chernobyl explosion was a steam explosion that threw nuclear material into the air.

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The moon also doesn’t orbit at the same plane as the earth around the sun, so sometimes it’s above the sun and other times it’s below

There wasn’t much of a real “threat”, in that planes wouldn’t fall out of the sky. but banking systems would probably get quite confused, and potentially lead to people being unable to access money easily until it got fixed.

Well that was when they performed lithobraking with a satellite, but they also did lithobraking on purpose for several rover landings

Guess what, Canada sets the freezer at -15 Celsius. The USDA just chose 0F because it’s good enough and a nice easy to remember number, there is nothing special about it.

Same with all your other numbers, your just using whatever the closest even F value is that’s easy to remember there’s nothing special about any of them and we have equivalents in Celsius