Introduction to Astrobiology


Astrobiology is the scientific study that deals with the possible origin, distribution, evolution and future of life in the universe, including that on Earth, mainly using a combination of methods from biology, chemistry and astronomy.



Some believe that life on Earth may have originated through these "seeds". Panspermia suggests that life could have existed on another planet and moved to Earth. Statistics have showed 7.5% of rocks from Mars reach Earth. 

 



Scientists believe the meteorite was probably blasted off of the surface of the planet Mars about 16 million years ago by an impact with an asteroid and traveled through space to the earth, where it landed on Antarctica about 13,000 years ago. 





Mold and fungus, as well as other microbes including germs, were being affected and altered by a constant bombardment of solar and other forms of radiation from outer space.

CONDITIONS OF EARTH AND OUTER SPACE
The four most common elements in the universe are hydrogen, helium, carbon and oxygen. Helium is inert. So the three most abundant, chemically active ingredients in the cosmos are also the top three ingredients in life on Earth.


Factors
•Micro-gravity
•Cosmic radiations
•Solar UV radiations
•Space vacuum


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