imagine.gsfc.nasa.gov

X0L5j TIL that if the universe is finite, then we could travel on a spaceship and after a very long time we would eventually come back to be same place that we started.
NXbQb TIL about Neutron stars, pulsars, and magnetar. And Interesting fact is that if Neutron collides with earth, then life on earth would probably perish well before the planet is destroyed - a NS is a strong source of X and soft gamma rays, that will sterilize the planet well before it reaches surface.
9wQlB TIL all the stars we see in the night sky are in our own Milky Way Galaxy