"Every atom in your body came from a star that exploded. And the atoms in your left hand probably came from a different star than your right hand. It really is the most poetic thing I know about physics: You are all stardust.
PHD Comics: Gravitational Waves Explained Simple explanation but really interesting for further understanding on gravitational waves. "That's one small step for man, one giant leap for mankind" Neil Armstrong quote Mehr
The Dance of Venus. An accurate scientific drawing of Venus amazing pattern around the Earth Did you know that Venus, our closest planetary neighbour, draws a beautiful fivefold pattern around Earth? She does this every eight years.