His son Martin was also an astronomer who did pioneering work on the range of stellar masses. At the age of 16, he published a paper on binary orbits, and went on to made advances in photographic methods. FTP, name this German scientist, who proposed the first solutions to the partial differential equations of the general theory of relativity in papers written while he served on the Russian front in 1916, and who is best known for theorizing that a star contracting under gravity will reach a limit be yond which nothing 
His son Martin was also an astronomer who did pioneering work on the range of stellar masses. At the age of 16, he published a paper on binary orbits, and went on to made advances in photographic methods. FTP, name this German scientist, who proposed the first solutions to the partial differential equations of the general theory of relativity in papers written while he served on the Russian front in 1916, and who is best known for theorizing that a star contracting under gravity will reach a limit be yond which nothing can escape, a radius beneath which stars become black holes.
His son Martin was also an astronomer who did pioneering work on the range of stellar masses.
Karl Schwarzchild