For the crew of a spacecraft ramping up to light speed, interstellar space would appear highly compressed, thereby increasing the number of hydrogen atoms hitting the craft.

对宇宙飞船的船员来说，速度升高到光速，宇宙空间将被高度压缩，因此增加了撞击飞船的氢原子数量。

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For a crew to make the 50, 000-light-year journey to the centre of the Milky Way within 10 years, they would have to travel at 99.999998 per cent the speed of light.

要在10年内飞行50000光年到达银河系中心，飞船速度必须达到光速的99.999998%。

youdao

For a crew to make the 50, 000-light-year journey to the centre of the Milky Way within 10 years, they would have to travel at 99.999998 per cent the speed of light.

要在10年内飞行50000光年到达银河系中心，飞船速度必须达到光速的99.999998%。

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