Worked out the period ~ luminosity relation of Cepheid variables (Leavitt's Law) enabling measurement of stellar distances beyond the range of trigonometric parallax. This work enabled measurement of the size of the universe and discovery of the expansion of the universe.
TRUTH Journalism is printing what someone else does not want printed. Everything else is public relations. George Orwell --- Sounds like 'the obama liberal media PR machine. Journalism is dead in liberal media.