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Why is the universe 15 billion years old?
Why not 16? Why not 15 trillion? Why not 4 million?
From what I can gather, when the big bang occurred, the universe came into existence around
15 billion years ago. But what happened before this time?
http://www.google.com/search?source...ox&ie=UTF-8&oe=UTF-8&rlz=1I7ACAW_enUS378US378
The age of 4.54 billion years found for the Solar System and Earth is consistent with current calculations of 11 to 13 billion years for the age of the Milky Way Galaxy (based on the stage of evolution of globular cluster stars) and the age of 10 to 15 billion years for the age of the Universe (based on the recession of distant galaxies).
http://pubs.usgs.gov/gip/geotime/age.html
Age of the UniverseEvolutionary astronomers confidently argue the universe
is 12-20 billion years old, ... that the universe is somewhere between 7 and 16 billion years old. ... About 20 years ago, Halton Arp and John Bahcall published a debate in The ...
ldolphin.org/univ-age.html
.Begining of the UniverseThe universe as astronomers have calculated borned
between 8 and 16 billion years ago. It is formed probably 15000 million(15 billion) years ago.
library.thinkquest.org/21008/data/universe/begin.htm - Cached - Similar
Universe Age Estimated At 16 Billion Years .
Universe age estimated at 16 billion years . LA times-washington Post Service . PASADENA, Calif. - The universe was created 1 6 billion year ago, ...
news.google.com/newspapers?nid=1951&dat=19741222&id...
Estimated Age of Milky Way
Scientist refines cosmic clock to determine age of Milky WayJun 29, 2005 ... The University of Chicago's Nicolas Dauphas has estimated the age of the Milky Way at approximately
14.5 billion years by combining ...
www-news.uchicago.edu/releases/05/050629.milkyway.shtml
Estimated Globular Custer Age
The oldest globular clusters contain only stars less massive than 0.7 solar masses. These low mass stars are much dimmer than the Sun. This observation suggests that the oldest globular clusters are between
11 and 18 billion years old.
http://answers.yahoo.com/question/index?qid=20080730215515AA6bT4A