/u/GeneReddit123's posts
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If the universe is uniformly expanding faster than the speed of light, why haven't atoms been torn apart?
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Some people can see visible light from 380nm to 800nm. Would they see 390nm and 780nm as "similar" due to being double the frequency, just as humans can tell a similar "C" pitch in different octaves?
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If you accelerated towards the colder side of the CMB until it became the same temperature in all directions, and then continued moving, would you eventually arrive at a sector of the universe where you are at rest relative to the matter around you? Would that place be "the center of the Universe"?
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Can we use galactic (Sun-Galactic orbit) parallax to measure larger distances than possible with stellar (Earth-Solar orbit) parallax?
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Can a planet's gravity be sufficiently high that chemical rockets with a given specific impulse can never leave the planet?
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