Complex sentence: The crater was initially known as the feature A. The bright appearance of rays in the radar images indicates that the crater is geologically young, because fresh and rough surfaces of young craters are good scatterers of radio waves.
Split into simpler sentences: The crater was initially known as the feature A. The bright appearance of rays in the radar images indicates that the crater is geologically young. The fresh and rough surfaces of young craters are good scatterers of radio waves.