The universe is a massive space that we know very little about. Just like millions of other people, I am very curious about what could be outside of our home planet, Earth. The reason that I am so intrigued is that there is so much to information to learn, and so much information that humans have yet to learn. Maybe we are the only living things in the universe, or maybe there’s a race of aliens planning on invading our planet in the near future. Who knows? Although there is no evidence of extraterrestrial life, there are trillions of planets planets that we humans have never explored, let alone seen through telescopes. There must be life on other planets somewhere in the universe.The universe is incomprehensibly large and holds over 100 billion galaxies and contains approximately 1,000,000,000,000,000,000,000,000 planets (http://scienceblogs.com/startswithabang/2013/01/05/how-many-planets-are-in-the-universe/). Some of these even contain water in the atmosphere. In 2007, astronomers discovered water in the atmosphere of another planet. Unfortunately, it’s about 64 light years from us (Alone In The Universe, 10). Earth-like planets have also been discovered orbiting stars that are similar to our sun. These planets are small, rocky and can contain water at the right temperature. Using this information, we can estimate that there are a billion stars in the Milky Way that are orbited by earth-like planets containing water (Alone In The Universe, 11). Keep in mind, that that estimate is only for planets in our galaxy.