Final answer:
Dr. X. Pert symbolizes notable scientific figures such as John Wheeler and Subrahmanyan Chandrasekhar, who contributed significantly to physics and astronomy, including the conceptualization of black holes and stellar evolution, and were honored with Nobel Prizes.
Step-by-step explanation:
Dr. X. Pert is likely a fictional placeholder name, but based on the context provided, there are several notable individuals who could fit the identity of 'Dr. X. Pert'. One such figure is the brilliant physicist John Wheeler, who made pioneering work in general relativity theory and popularized the term 'black hole' starting in the late 1960s. Another figure could be the astronomer Subrahmanyan Chandrasekhar (Chandra), who joined the faculty at the University of Chicago in 1937 and made major contributions to many fields of astronomy, including the understanding of black holes and the behavior of stellar corpses, and for this early work, he received the Nobel Prize in physics in 1983. Moreover, the discoveries mentioning the nature of viruses and the Nobel Prize in 1946 could refer to the groundbreaking work in virology, although a specific individual is not named.