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Q & A: age of universe

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Most recent answer: 05/16/2009
Q:
what is the age of universe???????
- Fatima (age 16)
Pakistan
A:
Many different lines of observation indicate that the answer is 13.7 billion years.
Mike W.

The age of the universe is related to the Hubble Constant, H, (which isn't really a constant).
See  http://en.wikipedia.org/wiki/Hubble%27s_law  for a lot more information.  
The universe seems to be  expanding.  Galaxies far away appear to be receding from our own galaxy, the Milky Way, at a velocity of V = HD where D is the distance to the far galaxy. Astronomical measurements give H = 72 km/sec/megaparsec plus or minus a couple of percent.   Basically the age is given by the inverse of H.   There are corrections due to general relativity but the answer is close to other estimates of the age of the universe.
LeeH


(published on 05/16/2009)

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