Age of Universe ?

**saurabhkumarsingh** · October 27th, 2013, 02:41 PM

What is the age of universe and how it is calculated ? Please also mention how the distance of stars and galaxies are calculated .

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**Cogito Ergo Sum** · October 27th, 2013, 03:05 PM

Here you go:

http://map.gsfc.nasa.gov/universe/uni_age.html
Distance in space?
HowStuffWorks "How are astronomers able to measure how far away a star is?"
http://www.scientificamerican.com/ar...onomers-measur

**saurabhkumarsingh** · October 27th, 2013, 03:16 PM

Thanks Buddy

**saurabhkumarsingh** · October 27th, 2013, 03:17 PM

Thanks buddy but the age of universe part ?

**Cogito Ergo Sum** · October 27th, 2013, 03:22 PM

Originally Posted by saurabhkumarsingh

Thanks buddy but the age of universe part ?

From the first link (last paragraph):

"Measurements by the WMAP satellite can help determine the age of the universe. The detailed structure of the cosmic microwave background fluctuations depends on the current density of the universe, the composition of the universe and its expansion rate. As of 2013, WMAP determined these parameters with an accuracy of better than than 1.5%. In turn, knowing the composition with this precision, we can estimate the age of the universe to about 0.4%: 13.77 ± 0.059 billion years!"