Cosmos

 1. There are over 500 billion stars in our galaxy alone, and some estimates put that number at trillions of stars across the universe.  2. Our sun is 4.6 Billion years old and has used up 1/5th of its fuel supply. By the time we reach the end of this century, our Sun will no longer be a viable energy source.  3. We have discovered 17 exoplanets (planets around other stars) outside of our solar system. Of those 17 planets, 2 actually orbit their star inside their habitable zone. This means that these planets do not burn off all of their atmosphere into space like Mercury does nor freeze solid like Venus. If life can exist here, then perhaps it can exist elsewhere in the Universe.  4. In 2011, Scientists announced the discovery of Kepler-22b; a planet just 55 light-years away from Earth. They determined that the planet was likely rocky and potentially had liquid water flowing on its surface. So it may be possible that there could be life out there somewhere else in th...