The Milky Way galaxy (pictured above) is an example of a(n) ____ galaxy. At the center of the galaxy is a galactic bulge that is around 20,000 light years long. In the very center of the galaxy is a massive ____ that is 4 million times the mass of the sun and has a huge gravitational pull.
A. Spiral, Supernova
B. Spiral, Black Hole
C. Elliptical, Supernova
D. Elliptical, Black Hole
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