You don't discard Newton. Newton becomes the limiting case of how you would apply Einstein's theories.
Neil deGrasse TysonIn any case, the leading edge of our "on purpose" radio signals is 30 light-years away and, if intercepted, may mend the aliens' image of us based on the radio bubble of our television shows. But this will happen only if the aliens can somehow determine which type of signal comes closer to the truth of who we are, and what our cosmic identity deserves to be.
Neil deGrasse TysonYou don't need to be a scientist to know Earth's age or that life evolved. You just need be one who embraces objective truths
Neil deGrasse Tyson