I like to think of the cosmos as a theater, yet a theater cannot exist
without an audience, to witness and to celebrate. Robot craft and
mighty telescopes will continue to show us unimaginable wonders. But
when humans return to the moon and put a base there and prepare to go
to Mars and become true Martians, we–the audience–literally enter the
cosmic theater. Will we finally reach the stars? — Ray Bradbury, National Geographic