Question

Your sun orbits in a circular orbit around the center of the milky way galaxy. The radius of the orbit is 2.2x10^20m, and the angular speed of the sun is 1.1x10^-15. How long (in years) does it take for the sun to make one revolution around the center?

Answer 1

226 to 250 million years

Step-by-step explanation:

• Since the sun is about 26,000 light-years from the centre of the milky way the sun travels at a speed of about 782,000 km per hour in a circular orbit around the centre of the milky way.

• As sun itself is formed some 4.6 billion years ago the sun thus needs to speed up and this phenomenon is called as the cosmic year i.e is the amount of the time it will take the sun to reach the centre of the galaxy.