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23 Nov 2019
The Sun rotates around the center of the Milky Way Galaxy at adistance of about 30,000 light years from the center (1 light year= 9.5X1015m).
A. If it takes about 200 million years to make one rotation,estimate the mass ofour Galaxy. Assume that the mass distributionof our Galaxy is concentrated mostly in a central uniformsphere.
B. If all the stars had about the mass of the Sun (2X1030kg), howmany stars would there be in our Galaxy?
The Sun rotates around the center of the Milky Way Galaxy at adistance of about 30,000 light years from the center (1 light year= 9.5X1015m).
A. If it takes about 200 million years to make one rotation,estimate the mass ofour Galaxy. Assume that the mass distributionof our Galaxy is concentrated mostly in a central uniformsphere.
B. If all the stars had about the mass of the Sun (2X1030kg), howmany stars would there be in our Galaxy?
