Using newton's version of kepler's third law ii the sun orbits the center of the milky way galaxy every 230 million years at a distance of 28,000 light-years. use these facts to determine the mass of the galaxy. (as we'll discuss in chapter dark matter, dark energy, and the fate of the universe, this calculation actually tells us only the mass of the galaxy within the sun's orbit.) m= solar billion years
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Using newton's version of kepler's third law ii the sun orbits the center of the milky way galaxy ev...
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