Final answer:
It is false that the black hole hypothesis has been rendered moot in astrophysics; black holes are essential to understanding various cosmic phenomena, supported by evidence from telescopes and gravitational wave detections.
Step-by-step explanation:
The hypothesis on black holes is false; it is not rendered moot as an explanation in astrophysics. On the contrary, black holes are crucial to our understanding of various phenomena in the universe. Observations through devices like the Hubble Space Telescope and various X-ray satellites have provided evidence that black holes do indeed exist. Tests of Einstein's general theory of relativity related to the effects of gravity near massive objects further support the existence of black holes. We have come to understand that black holes play a significant role in the structure of the cosmos, influencing the behavior of collapsed stars and the centers of massive galaxies.
For instance, the energy emitted by quasars, which are incredibly luminous and energetic areas found in the center of some galaxies, is now known to be due to the presence of supermassive black holes. In addition, while black holes themselves do not emit radiation that we can directly observe, they do affect their environment in ways that can be detected, such as by pulling in matter and creating high-energy jets or by emitting gravitational waves as they interact with other massive objects.