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intergalactic travel
Intergalactic travel is space travel between galaxies. Due to the enormous distances between our own galaxy the Milky Way and even its closest neighbors—hundreds of thousands to millions of light-years—any such venture would be far more technologically demanding than even interstellar travel. Intergalactic distances are roughly a hundred-thousand fold (five orders of magnitude) greater than their interstellar counterparts.
The technology required to travel between galaxies is far beyond humanity's present capabilities, and currently only the subject of speculation, hypothesis, and science fiction.
However, scientifically speaking, there is nothing to indicate that intergalactic travel is impossible. There are in fact several conceivable methods of doing it; to date there have been a few people who have studied intergalactic travel in a serious manner.
==The difficulties of intergalactic travel==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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