Abyssal plains were not recognized as distinct physiographic features of the sea floor until the late 1940s and, until very recently, none had been studied on a systematic basis. They are poorly preserved in the sedimentary record, because they tend to be consumed by the subduction process.
The first man to discover that the earth moves around the sun was an Italian scientist named Galileo Galilei.
Who created the modern model of the solar system by discovering that the planets move in ellipse? Johannes Kepler. Astronomers discovered a moon that does not orbit a planet? that would ruin the very definition of a moon. a moon is an object that orbits a planet, so it's impossible.