The study on astrobiology focuses on finding life outside of our solar system. Many people tend to ask the question is there life outside of Earth. Earth is only a tiny speck out of billions of billions of planets beyond outer space and our solar system. 

NASA has been studying astrobiology since the 1990s, and the search for life continues on. There are no clear indications of any signs of life on another planet besides Earth, but astrobiologists believe there is. A big achievement that scientists have come up with is how they identify the habitable zone. This has been very helpful for the research on finding if life is able to sustain itself on the planet. Although we are proof that living things are possible, how do we know that living things are also on different planets besides us?

It is very likely that life exists on other planets, but is just too far away from earth that we are unable to reach it. Those who study astrobiology try to find out how life started on Earth so it can be looked at in the same way as finding life on other planets. There have been missions like Kepler, which launched on March 6th of 2009 to search for Earth-sized planets in the habitable zone of their star. Scientists launched this because as Earth is in the habitable zone of the sun, they used that information to look for similarities on extraterrestrial planets.