…In the last twenty years, astrobiology has transformed from marginal interdisciplinary science into a modern discipline that encompasses much more than the physics, chemistry and biology of the universe.
Everyday research that strives to become familiar with the biological phenomena in our big house called the universe is all the more reason for us to hope and believe that there are living creatures in the universe, at least at a microscopic level, perhaps even at our immediate planetary level.
From the initial research of youth enthusiasts in the SETI program, which has been funded by NASA for years, there are now thousands of professional and serious scientists hoping that their current research will become reality and that we will really be able to communicate with other, extraterrestrial and possibly extrasolar species of intelligent living creatures.
Before the end of my student period I was concerned with this discipline, and especially I was interested in the possibility of living creatures developing in the media other than water, so I was working in the category of extremophiles.
If you want to learn more about the basics of Astrobiology and its theoretical and practical research, I recommend that you enter a free course at Coursera.com:
And for the beggining of your own research in this fields, to find out more about the possibilities of living in space, I recommend excellent books by one of the founders of modern science fiction, Isaac Asimov.