MadSci Network: Astronomy

Subject: Something about the Big Bang puzzles me.

Date: Sun Jun 22 05:38:03 1997
Posted by Gerry Robertson
Grade level: nonaligned
School: No school entered.
City: Ventura State/Province: CA
Country: USA
Area of science: Astronomy
ID: 866975883.As
If a certain object is said to be, say, 15 billion light years away, that 
means that the light we are seeing left that object 15 billion years ago.  
At that time, it must have been much closer.  If that's the case, why 
didn't the light already get "here"?  And if objects that are that old, 
or older (20 billion LY?) are said to define the "edge" of the universe, 
and therefore presumably represent the beginning of the universe, does 
that mean that they were fully formed (at least to the extent that we 
are observing them now) at that point?

Re: Something about the Big Bang puzzles me.

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