With Finkelstein, the coordinates of the world line of a freely falling photon are named for this man.
With Finkelstein, the coordinates of the world line of a freely falling photon are named for this man. His namesake limit is violated by eta-Carina and some novae; that limit gives the luminosity at which radiation pressure is exactly counteracted by gravity and above which he claimed stars would blow themselves apart.   He is also the namesake, with Zhevakhin, of a model for variable stars, and this author of Expanding Universe and The Internal Constitution of Stars argued in a 1920 address that the sun produced energy via helium fusion.  However, he may be most famous for the results of his 1919 trip to Principe island.  FTP, name this scientist whose observations of a solar eclipse helped confirm Einstein's theory of relativity.
With Finkelstein, the coordinates of the world line of a freely falling photon are named for this man.
Arthur Stanley Eddington