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March 11, 2013


The study of the origin, evolution, distribution, and future of life in the universe is called Astrobiology. In other hand the study of extraterrestrial life and life on Earth is called astrobiology. This interdisciplinary field encompasses the search for habitable environments in our Solar System and habitable planets outside the Solar System, the search for evidence of prebiotic chemistry, laboratory and field research into the origins and early evolution of life on Earth, and studies of the potential for life to adapt to challenges on Earth and in outer space.

An image showing the AstrobiologyThe term exobiology is almost similar to astrobiology, but it covers the search for life beyond Earth, and the effects of extraterrestrial environments on living things. The word astrobiology is derived from the Greek ἄστρον, astron, “constellation, star”; βίος, bios, “life”; and -λογία, -logia, study. The synonyms of astrobiology are structured in relation to the most important sciences implied in its development in astronomy and biology.

At first it has named as exobiology, which is from the Greek Έξω, “external”; Βίος, bios, “life”; and λογία, -logia, study. The term exobiology was first introduced to the world by molecular biologist Joshua Lederberg. Exobiology is measured to have a narrow scope limited to search of life external to earth, whereas subject area of astrobiology is wider and investigates the link between life and the universe, which includes the search for extraterrestrial life, but also includes the study of life on earth, its origin, evolution and limits.

Astrobiology is the study, which will be done with the application of physics, chemistry, planetary science, astronomy, ecology, geography, biology, molecular biology, and geology to investigate the possibility of life on other worlds and help recognize biospheres that might be different from the biosphere on Earth. The only place in the universe known to harbor life is “THE EARTH”.

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