The past several decades have uncovered many space mysteries we do not understand. While our brightest minds struggle to answer some of the big questions of the universe, the rest of us can reflect on just how much there is to know about our galaxy. Here are twenty of the more interesting observations we have made which do not yet have satisfactory explanations.
1. Space Roar
There is a radio signal in outer space that we can translate into sound. On January 7, 2009, Alan Kogut’s team at NASA recorded what is now referred to as the “Space Roar”. It is six times louder than the theorized output of old stars and scientists still cannot explain why it is so loud or where the sound comes from.