The Miller-Urey experiment was a chemistry experiment that was designed to simulate the condition present on the Earth in its early years, in order to test the original conditions of life.
The experiment impacts the way scientists think about the origin of life in a significative way: the experiment was in accord with the hypothesis that the chemistry of the Earth at its early days was more favorable to reactions that would be able to synthesize complex compound starting from simpler. inorganical factors.
the elements that seem necessary for life to arise, even on an extraterrestrial planet are: a source of energy, like the sun, water, and amino acids (these could be found in comets, like the Murchison meteorite), and so it is totally possible to speculate that the life in an extraterrestrial planet could arise with the right conditions.
