NASA satellite (UARS) may or may not have crashed in Canada。There are currently more than 20,000 artificial satellites orbiting the earth (most of them military satellites).。More satellites will fall on our heads in the future.。This time, the probability of the debris hitting someone was 1/3200.、Suppose that 20,000 will fall from now on (although new ones will be launched in the meantime)、Leaving that aside), then、The probability is quite high、It will be necessary to consider the possibility of damage to people and buildings as a real problem.。
on the other hand、The moon is Earth's natural satellite、This one, on the other hand, seems to be moving away little by little.。If you move a certain distance away, the rotation of the earth will become unbalanced.、It is predicted that their movements will become unstable and unpredictable.。The impact could extend to the entire solar system。most、That will happen about 5 billion years from now.、Normally, it has no bearing on our lifespan.。
That's not what America is for, though.、Apparently they are seriously considering sending humans to Mars.。Space shuttle program ended、America's space program is on hiatus、The announcement of plans for Mars 10 years from now means、Developed in secret during that time、It just means to continue the simulation.。Japan's plans are all about the short term.、I want people to sit down and think about this (even if it means changing the Prime Minister every month).。
This year's "Mid-Autumn Harvest Moon" has already passed on September 12th (I remember that it was a good month)。Since the earthquake、I feel like I've only been looking at my feet.、Thanks to this problem, I was able to look up at the sky for the first time in a while.。 2011/9/24