Valentine Bargmann studied the central extension of an algebra named for this physicist that characterizes symmetries of the Schrödinger equation. Taking the limit as c tends to infinity in the Poincaré group produces a 10-dimensional (15[2])group named for this physicist (-5[3])containing namesake “transformations” (-5[3])mapping (-5[1])“x” (-5[1])to “x (-5[1])minus (-5[1])v t.” (-5[2])It’s not (15[2])Einstein, (15[2]-5[3])but this (15[1])physicist (15[1]-5[1])deduced a principle of equivalence (-5[1])of inertial (-5[3])reference (15[1])frames (-5[1])in (15[2])(*) relativity (-5[1])with a thought experiment (10[1]-5[1])involving the detection of motion on a smoothly sailing (10[3])ship. (10[3])This (10[1])physicist (-5[1])reportedly demonstrated the invariance of gravitational (10[2])acceleration (10[1])by dropping (10[1])balls of differing masses (10[5])from the Leaning (10[2])Tower (10[4])of (10[3])Pisa. (10[7])For 10 (10[1])points, (10[2])name this early physicist (10[1])and astronomer (10[1])whose espousal of Copernicanism (10[2])led to his censure (10[1])by the Catholic (10[1])church. (10[1])■END■ (10[8])