2006-07-29 08:17:49 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
The most precise estimate (13.7 +/- 0.2 billion years) is based on an analysis of the WMAP data on the cosmic microwave background radiation (CMBR) by which the researchers determined how old the universe was at the time of the CMBR and how distant it is.
This estimate is consistent with other estimates based on galactic red shifts, stellar evolution theory, and decay of radioactive elements.
2006-07-29 09:01:24 · answer #1 · answered by injanier 7 · 8⤊ 2⤋
It is determined by the movement of the galaxies and the age of the stars. ( I was guessing ) .
2006-07-29 08:23:14 · answer #2 · answered by xinnybuxlrie 5 · 0⤊ 0⤋
all objects in universe are moving away. by tracing their motion backwards, u can reach a single point. bigbang.
2006-07-29 08:22:30 · answer #3 · answered by TruthIsGod 2 · 0⤊ 0⤋
Extrapolation from existing trends, carried back in time.
2006-07-29 08:20:35 · answer #4 · answered by Pseudo Obscure 6 · 0⤊ 0⤋