What did scienctists dscover when they used the spectroscope to study light from stars in distant galaxies?
mostly the elements present and the speed of their recession via the red shift.
G'day good question!!\nWell I'm all for space exploration, cos in the very long term it will be important for us to leave this place, scientists believe that places like Mars actually contain water in the soil in the form of Perma Frost, and if it could be released then perhaps we could live there one day. The giant moon of Jupiter ( Europa) is covered in a sheet of ice, what is under the ice is not known, perhaps a type of life form ( now that would create all sorts of questions don't u think?)