Pop a bottle Sputnik you are now 50 years old! Space travel is still young and we must not get content with what we have found out. We have only stepped foot on our moon and sent robots to a few places. We still have a ways to go, by 2057, space astronomy will also have cracked other unsolved problems about our universe, like gravitational waves. Predicted by Einstein, Joseph Taylor and Russell Hulse convinced us they exist when they observed their effects on a system of two neutron stars (for which they shared the 1993 Nobel Prize in Physics). But no one has yet observed them directly. There is no doubt that instruments floating in space will give the final answer.
This article encourages entrepreneurs to keep digging deep for the answers that lie out there because there are profits to be had out in space.
http://www.iht.com/articles/2007/10/03/news/edsputnik.php
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