assuming that all life shares common properties, what should exobiologists be looking for as they explore other worlds?
exobiology is the study of life on other planets. in recent years, scientists have sent various spacecraft out into the galaxy in search of extraterrestrial life. assuming that all life shares common properties, what should exobiologists be looking for as they explore other worlds?
If you do assume common properties - and that is a very big assumption - then liquid water is one of the things to look for. Exobiologists define a "life zone", which is the distance a planet needs to be from its sun in order to achieve temperatures that would allow liquid water to occur. Then if a planet is in the life zone, they would look for signs of water on the planet.
Beyond that, some sort of an atmosphere is considered necessary, as atmospheres work as an insulating layer to even out huge temperature swings between day and night. The planet would also need to be old enough to have some stable surface - if the whole thing is spouting volcanoes, that would not be considered too conducive to life developing.
The other big thing is looking for evidence of DNA or RNA; that would be a big find.
You must know that one of hypotheses of formation of the organic world is a hypothesis of panspermiа. It is a hypothesis of interplanetary scale. You may belong to this dualistically - to deny or accept. Interesting, to my mind, there is that basis of wild-life on our planet is carbon, lifeless - silicon.Some scientists suppose castling of these assertions on other planets. It would be interesting to know, because silicon is very near to the carbon.If wild-life in basis consist of silicon ----- it would be worked out many problems of natural science, but it is quite another theme already .)))