Space To Me Is Everything Black Holes Worm Holes Cosmic Clusters Galaxies Exotic Matter Super Nova's White Dwarfs Red Giants The Cosmological Expansion Of The Universe. Oh also Quantum physics things like protons electrons gluons neutrons quarks and even how the brain works from the brocas area the production of speech to the wernickes area the understandance of speech... I love it all.. What do you guys love?