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...

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?

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pacorz's profile pic

pacorz | High School Teacher | (Level 3) Educator

Posted on

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.

she-chemist's profile pic

she-chemist | College Teacher | (Level 2) eNoter

Posted on

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 .)))

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