Astronomy questions?

Oh, so sad that nobody is responding to your questions. I don't know what scientists hope to accomplish by even looking for life sustainable conditions on other terrestrial bodies. Earth is us humans' home. Nobody would be happy if they couldn't look side to see trees and animals and other forms of life. In my opinion all this reasearch is just a waste of money that could be spent on other things. I don't mean to insult you with that comment, it is obvious you are very intelligent on these astronomy issues. I am just stating my opinion.