Question

The Sun orbits the Milky Way galaxy once each 2.60 * 10^8 years, with a roughly circular orbit averaging 3 * 10^4 light years in radius. Calculate the average speed of the sun in m/s.

Whew! Should I convert the 3*10^4 light years to meters, and then divide that by 2.60*10^8 years converted to seconds? I tried to do that and was wrong.

Answer 1

circumference in light years
= 2 pi *3 * 10^4
I think you left the 2 pi out. You need circumference not radius.

Answer 2

Yes, that is it

Did you do the 2PIxr for distance?

Answer 3

https://www.google.com/search?q=+converting+light+years+to+distance&ie=utf-8&oe=utf-8&client=firefox-b-1

Answer 4

Thank you! That was it!