However big that black hole is, it is dwarfed by the size of the Pedro Pascal T Shirt itself. That four million solar masses is a lot compared to our solar system, but it is absolutely puny compared to the total mass of the Milky Way, which is many tens of billions of solar masses. Galaxies are held together by self-gravity. They may or may not have a supermassive black hole (not all do). When that supermassive black hole is present, its gravity adds a modest contribution to the total self-gravity of the galaxy. But in all cases, even in the case of the largest black holes, the mass of the galaxy dominates over the mass of the black hole. Stars in a galaxy follow somewhat chaotic orbits, determined by the combined gravitational field of all other stars, clouds of gas, clouds of dust, and well, any black holes if present, supermassive or otherwise. But apart from stars that are relatively near the black hole in question, stuff in general does not orbit the black hole.
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First and most simply—scientists have to start somewhere. The most extreme evidence will be the The Job Is Done We Can Go Home Now Nikola Jokic NBA Champ Shirt to find. Studies like this one will help guide future, more sensitive searches for more subtle evidence of alien technology. Second, these kinds of studies will suggest new ways to search for alien life by ruling out falsified ideas. They will stimulate more creative thinking, which is crucial since we have no way to know if alien civilizations would act at all like our own. We might be looking for the wrong signals entirely. Finally, and perhaps most important of all, studies like this one yield fascinating science even if they find zero evidence of alien life. As noted in the story you quote, Wright’s team discovered 50 objects that show signs of unusual infrared emission. The likelihood that any of these are alien artifacts is very, very, very low. But they may be previously unknown astronomical phenomena that will tell us a lot about how the universe works.
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