Title text:
A lot of the highway department's budget goes to adjusting the sign whenever the moon passes directly overhead.
Transcript:
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Source: https://xkcd.com/3174/
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Hamartiogonic 31 points 10 months ago
Not just the moon. You can’t just drive here with a 46 billion light year tall lorry without crashing into some stars, galaxies, black holes and what not.
PixelatedSaturn 19 points 10 months ago
Really?
Can we calculate this? Let's do specs first. Let's say we only drive until the next overpass, which is likely in the next few km , let's say 5. And we drive 40kmh so for 450 second the lory is swinging around the universe trying to hit anything. Would it?
skibidi 45 points 10 months ago
Well.. Earth's rotation would mean that the top of the lorry would be moving at 3.3 million light years per second ... Or you know, about 100 trillion times the speed of light.
That might break some things.
Snazz 11 points 10 months ago
Unless the lorry was driving over the exact geographic north or south pole.
Side note: the tallest lorry where the top doesn’t move faster than the speed of light at the equator is 3.8 light hours tall, which is weird to think about because the top doesn’t start moving until well after the bottom has reached it’s destination.
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True. But wind sheer in the lower atmosphere could be an issue. Sometimes the moon gets in the way, too.
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