Comment by II2II

> Can anybody steel man the practical value of this kind of research for me? It seems to me that almost all astronomy, particularly the sort studying very large scale phenomena like this, is essentially useless for humanity.

The funny thing is: this science with few direct application to human affairs is one of the oldest sciences. Those few applications, as a standard of time and use in navigation, have had a far greater impact upon the establishment of human civilization than any other scientific discover.

It would be easy to argue that those are things of the distant past and that other branches of science have a more direct impact today. That's true. Yet it is also true that our curiosity of the heavens has been a constant. While our early notions were pure nonsense, they shaped society. While our initial discoveries of its true nature had little immediate impact upon everyday life, it formed the basis of future scientific development. For example: the Copernican model of the solar system was more true to the actual form of the solar system, but it was less accurate than the more refined Ptolemaic model. Kepler figured out the ellipses bit, through the extensive observations of Tycho Brahe. Observations of planetary motion provided evidence for Newton's theory of gravitation. Ironically, observations of planetary motion also lead to the refinement of the classical model by Einstein. The understanding of gravity has been fundamental to engineering. While it is plausible that much of that would have been discovered without astronomy, the development of special and general relativity depended upon astronomy. One of the most important applications of that is GPS.

Now it would be easy to argue almost all of these discoveries have their basis in the study of the solar system, but that's not really the point. In the times of Copernicus, Kepler, and Newton, the utility of studying the motions of the planets would appear to have about as much relevance as the study of the CMB does today. They certainly would not have been able to predict what we have discovered due to the foundations they laid. The same can be said of modern astrophysics. We can claim that it may help us detect and understand the nature of gravitation waves. We can claim that it is a handy tool since "the universe" is better at building particle accelerators than we are. Yet even if we made astounding discoveries along those line, people would still ask: what use is it? We can't really provide an honest answer for that since we have yet to travel that path through time (i.e. we don't know what the future holds).

If you ever have a chance, I suggest reading a book on the history of astronomy. You will find many names that you will probably know from other branches of science, and learn of the many discoveries that have been made or facilitated through astronomical research. (That's particularly true of physics and mathematics.)