评论
打印
If the asteroid had a radius of 1.75 meters, then in order to have Earthlike gravity at the surface, it would need to have a mass of about 500 million tons. This is roughly equal to the combined mass of every human on Earth.
如果小行星半径1.75米，那么它得有5亿吨重才能拥有像地球那样的表面重力，这差不多相当于地球上所有的人加起来那么重。
9． If you stood on the surface, you'd experience tidal forces. Your feet would feel heavier than your head, which you'd feel as a gentle stretching sensation. It would feel like you were stretched out on a curved rubber ball, or were lying on a merry-go-round with your head near the center.The escape velocity at the surface would be about 5 meters per second. That's slower than a sprint, but still pretty fast. As a rule of thumb, if you can't dunk a basketball, you wouldn't be able to escape this asteroid by jumping.
如果你站在星球表面，那么你就会感受到潮汐力。你的脚会感觉比头更“重”一些，你的感觉就像是被拉伸了一样：就像你躺在橡胶球的弯曲表面上，或者你躺在旋转木马的地上，并且头靠近中心。星球表面的逃逸速度约为每秒5米。这个速度比百米冲刺要慢，但其实还是挺快的。作为经验估算，如果你没法扣篮，那么你就不能通过竖直起跳的方式逃离这颗星球。
However, the weird thing about escape velocity is that it doesn't matter which direction you're going. If you go faster than the escape speed, as long as you don't actually go toward the planet, you'll escape. That means you might be able to leave our asteroid by running horizontally and jumping off the end of a ramp.
但逃逸速度诡异的地方在于，无论你朝哪个方向前进，只要你跑得比逃逸速度快，并且你不是正冲着地面而去，那么你就能逃出这颗星球。这意味着你可以通过水平跑动，并在坡道的尽头起跳的方式离开这颗星球。
If you didn't go fast enough to escape the planet, you'd go into orbit around it. Your orbital speed would be roughly 3 meters per second, which is a typical jogging speed. But this would be a weird orbit.
如果你的速度没有高于逃逸速度，那么你就会进入环绕它的轨道中去。你的轨道速度大约在每秒3米左右，也就是平常慢跑的速度。只是这个轨道显得有些奇怪……
