Official Tibopino Thibaut Pinot shirt
However big that black hole is, it is dwarfed by the size of the Official Tibopino Thibaut Pinot 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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One advantage of the numerous distance-measuring schemes in use, which overlap over a range of LGBT Bisexual be gay do crimes logo shirt from nearby to very distant, is that astronomers can calibrate and corroborate their measurements with multiple approaches. Such calibrations and corroborations thus lend an additional measure of reliability to these schemes. Indeed, by comparing results using different methods, weaknesses have been identified in certain schemes. In most cases, additional studies have demonstrated ways to guard against and correct for known difficulties. As a single example of these multiple approaches, prior to 2011 the distance to the Pinwheel Galaxy was determined, based on measurements of Cepheid variable stars in the galaxy, to be 20.9 million light-years, with an uncertainty of 1.8 million light-years. As of September 2011, measurements of the light output of the 2011 Type Ia supernova in the Pinwheel Galaxy are completely consistent with this distance figure…. In short, distances to astronomical objects can be and have been measured with substantial accuracy and reliability. For the most part, the calculations involved employ only basic mathematics taught in high school. Thus the overall conclusion of a universe consisting of billions of galaxies, most of them many millions of light-years away, is beyond reasonable doubt at the present time..
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