Astrobiology is the scientific study of life in the universe, focusing on the potential for life beyond Earth. It combines elements of biology, chemistry, and astronomy to explore how life might arise, survive, and evolve in different environments, including extreme conditions found on other planets and moons. Researchers in astrobiology investigate various celestial bodies, such as Mars and the icy moons of Jupiter and Saturn, to search for signs of past or present life. They also study the origins of life on Earth to understand the conditions that could support life elsewhere in the universe.