[noncount] : a quality that makes you continue trying to do or achieve something that is difficult. 1  What he lacked in talent he made up for in determination. 2  dogged/fierce/steely/stubborn determination.
The first modern solution of general relativity that would characterize a black hole was found by Karl Schwarzschild in 1916, although its interpretation as a region of space from which nothing can escape was first published by David Finkelstein in 1958.
1 First astronaut: Robert H. Lawrence, Jr., 1967, was the first black astronaut, but he died in a plane crash during a training flight and never made it into space. 2  Guion Bluford, 1983, became the first black astronaut to travel in space; Mae Jemison, 1992, became the first black female astronaut.