To explore deep space, an astronaut says we need to build a rocket factory on the moon
Strong gravity and a thick atmosphere allow us to live here on Earth, but also what make it so difficult to leave the planet. Rockets have to exceed at least 25,000 mph to escape Earth's gravity. That means spacecraft may end up using a substantial portion of their fuel before they even start …
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Izaak Magdich flipped this story into Space Colonies•2922d