What is astrobiology?

Astrobiology is the study of life within the universe. Astrobiologists study how life forms and develops, and where life can be found. Astrobiology involves the search for life outside Earth, the study of planets and moons within our Solar System, and the search for habitable planets around other stars. Astrobiologists also study life here on Earth (especially extreme life) to help them learn about the environments in which life can survive.