Asked by Rosa
What would you estimate to be the speed of a galaxy located 60 million light-years away?
Answers
Answered by
drwls
Multiply the Hubble constant by the distance. That will give you an average value.
For the Hubble constant (which is not really a constant), see
http://scienceworld.wolfram.com/physics/HubbleConstant.html
You may have to convert light years to megaparsecs
In practice, it is easier to measure the speed directly from the Doppler shift of spectral lines, than it is the to measure the distance.
For the Hubble constant (which is not really a constant), see
http://scienceworld.wolfram.com/physics/HubbleConstant.html
You may have to convert light years to megaparsecs
In practice, it is easier to measure the speed directly from the Doppler shift of spectral lines, than it is the to measure the distance.
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