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自从宇宙飞船把宇航员送上月球后,人类一直在为登上火星作准备。多少年来,飞向宇宙深处的星际旅行成为科学幻想的热门话题,其中“时空隧道”则是最大的幻想。宇宙实在太大、太大了。假定太阳停止发光,人类至少得在八分钟之后才知道这一事件。这八分钟是太阳光从太阳到地球所需的时间。光的传播速度是多少?每秒30万公里。由此可见太阳离我们有多远。同样,我们也不知道此时此刻发生在宇宙更远地方的事。因为我们所能看到的大部
Since spacecraft brought astronauts to the moon, humans have been preparing to board Mars. For years, interstellar travel to the depths of the universe has become a hot topic of science fiction, of which “space-time tunnel” is the biggest fantasy. The universe is too big and too big. Assuming that the sun has stopped glowing, humans must know the incident at least eight minutes later. These eight minutes are the time it takes for the sun to travel from the sun to the earth. What is the speed of light transmission? 300,000 kilometers per second. This shows how far the sun is from us. Likewise, we do not know at this moment what is happening further in the universe. Because most of what we can see