How do we know that objects seen in Hubble Deep Field are all the same age?

Subject: How do we know that objects seen in Hubble Deep Field are all the same age?

Date: Tue May 16 12:33:10 2000
Posted by cynthia kravitz
Grade level: grad (non-science) School: grad student
City: new york State/Province: ny Country: usa
Area of science: Astronomy
ID: 958494790.As

Message:


Isn't this notion-- that galaxies seen within a particular part of the 
Hubble Deep Field are of an equal age-- predicated upon the assumption 
that the 'Big Bang' is not only a theory, but a fact? How can scientists 
justify this assumption?

Re: How do we know that objects seen in Hubble Deep Field are all the same age?

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