First, we don’t know Earth is the only habitable planet. However, until we have some proof, we have no way of knowing for sure. That’s why we’re searching so hard for extraterrestrial organisms. 62 more words
Tags » The Solar System
Using our current technology, how close to us would an alien spacecraft have to be before it could detect Life on Earth?
During Earth’s night you can see the lights of major cities from the moon. So this would imply that further out from the moon one could detect light. 60 more words
If aliens in our galaxy are exponentially super advanced, why have they not completely colonized the entire Milky Way by now?
Well, let’s not put the cart before the horse. Right now we don’t know for sure that any life exists anywhere other than Earth. We suppose it does by mathematical calculations, but we haven’t even found a fossil of a microbe from space. 93 more words