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Versione delle 15:10, 27 feb 2009

Versione delle 15:15, 27 feb 2009

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[[Image:Baby Universe.jpg|thumb|The first-year map of the CMB.]]

On 11 February 2003, based upon one year's worth of WMAP data, NASA published the latest calculated age, composition, and image of the universe to date, that "contains such stunning detail, that it may be one of the most important scientific results of recent years"; the data surpass previous CMB measurements.<ref name="2003PressRelease">{{citecita web | url=http://www.gsfc.nasa.gov/topstory/2003/0206mapresults.html | titletitolo=New image of infant universe reveals era of first stars, age of cosmos, and more | publisher=NASA / WMAP team | datedata=[[11 Februaryfebbraio]] [[2003]] | accessdateaccesso=200827-0402-272009}}</ref>

Based upon the [[Lambda-CDM model]], the WMAP team produced cosmological parameters from the WMAP's first-year results. Three sets are given below; the first and second sets are WMAP data; the difference is the addition of spectral indices, predictions of some inflationary models. The third data set combines the WMAP constraints with those from other CMB experiments ([[ACBAR]] and [[CBI]]), and constraints from the [[2dF Galaxy Redshift Survey]] and [[Lyman alpha forest]] measurements. Note that there are degenerations among the parameters, the most significant is between <math>n_s</math> and <math>\tau</math>; the errors given are at 68% confidence.<ref name="2003spergel" />