Human's release a heat and this can be seen using an infrared, they also emit low level bioluminescence. Let's say a star is born on the edge of the galaxy and the light from that star won't reach earth for millions of years abd there is no technology yet to see this new star, does it exist? Just because no one has never seen it, doesn't mean it might not be there. Yes seeing is believing and there is no evidence of any kind to prove anything, I was simply trying to think outside the box and put a what if out there for the world to see.