Autonomous robots alone will be unable to realize those scientific goals in the foreseeable future, |
Human space flight beyond Mars is just not possible because of the increased exposure to galactic cosmic rays, |
Like most scientists, we felt that in the past human space exploration had been driven by politics and the science had been extremely thin. |
The received opinion among scientists is that it [human space exploration] is a waste of money. And if you start by looking at the cost, that is likely to continue to be the conclusion people will come to. |