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[i]A new study from [URL=https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018JA026136]Space Physics[/URL] redefines the boundaries of our planet, based on overlooked data collected at the end of the last millennium. The report concludes that the edges of the atmosphere actually extend more than 391,000 miles from the planet's surface, about twice as far as our moon.
This doesn't mean you can go moonwalking without a spacesuit, said Jean-Loup Bertaux, a study coauthor and planetologist. The hydrogen molecules that make up the outer atmosphere are so sparse that this region is still considered a vacuum. Any spacecraft traveling through it wouldn't notice a thing or be slowed by drag.
It does mean, however, that humankind has yet to leave the Earth's atmosphere.[/i]
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