The Milky Way. Center, Shape Globular cluster system Galactic coordinates Size of the Milky Way. Milky Way from Iowa. Milky Way from Australia. Milky Way from Australia. How do we locate the center of the Milky Way?.
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Flux versus luminosity relation
We can figure out the luminosity of a pulsating star by timing the pulsations. Since, we can measure its flux, we can then find the distance to the star.
We can use Kepler’s Third Law to estimate the mass of the Milky Way inside the Sun’s orbit
Where M in solar masses
a in AU
P in Earth years
Where M(r) is mass inside r (kg)
Change from P to velocity = v
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To do this yourself, read 19.5-19.6
Sgr A* is the bright object in the center of the image.
Makes flares in X-rays.