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Blog post: swansont: Ultimate Cosmic Space Mines

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Speed kills: Highly relativistic spaceflight would be fatal for passengers and instruments

 

Going slow to avoid severe H irradiation sets an upper speed limit of v ~ 0.5 c. This velocity only gives a time dilation factor of about 15%, which would not substantially assist galaxy-scale voyages. Diffuse interstellar H atoms are the ultimate cosmic space mines and represent a formidable obstacle to interstellar travel.

 

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