How do we get back to earth from the moon?
Seeing as Earth is just right for life, does that make hunting for ET futile?
Can we make gravity by spinning a spaceship?
Theoretically, there many be many universes but why do we think this?
Is it technically possible for two planets to share the same orbit, as in
exact polar opposites to each other...
Space is full of stars giving off huge amount of energy. So, why is it so chilly?