The Milky Way galaxy rotates about its center with a period of about 206 million years. The Sun is 2 1020 m from the center of the galaxy. How fast is the Sun moving with respect to the center of the galaxy?
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1 y = 365.24d * 86400 s/d = 3.156*10^7 s
Rotation period,
T = 2.06*10^8 y = 6.501*10^15 s
Radius of the Sun's circular path,
r = 2*10^20 m
Circumference of circle,
C = 2π r = 1.2567*10^21 m
Sun's speed
v = C/T = 193.3 km/s = 432400 mi/h
Rotation period,
T = 2.06*10^8 y = 6.501*10^15 s
Radius of the Sun's circular path,
r = 2*10^20 m
Circumference of circle,
C = 2π r = 1.2567*10^21 m
Sun's speed
v = C/T = 193.3 km/s = 432400 mi/h
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About 250 kilometers per second or 559,234.073 miles/hour