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Steady state of the Galaxy

by mmtwwla
Tags: galaxy, state, steady
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mmtwwla
#1
Oct19-13, 01:59 PM
P: 1
How can we make the assumption that the Galaxy is approximately in a steady state at the present time?
I read this from the textbook:
"the time required to complete one orbit at 10kpc is 3108yr... a typical disk star has completed over thirty revolutions, and hence it is reasonable to assume that the Galaxy is approximately in a steady state at the present time."
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phinds
#2
Oct19-13, 03:15 PM
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P: 6,336
Quote Quote by mmtwwla View Post
How can we make the assumption that the Galaxy is approximately in a steady state at the present time?
I read this from the textbook:
"the time required to complete one orbit at 10kpc is 3108yr... a typical disk star has completed over thirty revolutions, and hence it is reasonable to assume that the Galaxy is approximately in a steady state at the present time."
So, do you think that on the 31st revolution things are going to go crazy?


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