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Observations of distant supernovae indicate that the Universe is actually undergoing accelerated expansion<ref>Riess, A. G., et al. The Astronomical Journal, Volume 116, Issue 3, pp. 1009-1038.</ref><ref>Perlmutter, S., et al. The Astrophysical Journal, Volume 517, Issue 2, pp. 565-586.</ref> and galaxy surveys<ref>[http://www.sdss.org/dr5/ Sloan Digital Sky Survey]</ref><ref>Tegmark, M., et al. Physical Review D, vol. 74, Issue 12.</ref> and recent observations of the microwave background<ref>[http://map.gsfc.nasa.gov/ Wilkinson Microwave Anisotropy Probe]</ref><ref>See, for example, http://arxiv.org/abs/astro-ph/0603449</ref> have corroborated these claims. Conventional wisdom is that the acceleration is caused by some sort of [[dark energy]], which has not yet been directly observed.
Observations of distant supernovae indicate that the Universe is actually undergoing accelerated expansion<ref>Riess, A. G., et al. The Astronomical Journal, Volume 116, Issue 3, pp. 1009-1038.</ref><ref>Perlmutter, S., et al. The Astrophysical Journal, Volume 517, Issue 2, pp. 565-586.</ref> and galaxy surveys<ref>[http://www.sdss.org/dr5/ Sloan Digital Sky Survey]</ref><ref>Tegmark, M., et al. Physical Review D, vol. 74, Issue 12.</ref> and recent observations of the microwave background<ref>[http://map.gsfc.nasa.gov/ Wilkinson Microwave Anisotropy Probe]</ref><ref>See, for example, http://arxiv.org/abs/astro-ph/0603449</ref> have corroborated these claims. Conventional wisdom is that the acceleration is caused by some sort of [[dark energy]], which has not yet been directly observed.
Scientists refer to the theorized exact moment the Big Bang supposedly began as t=0 ("t" standing for "time"). At this time, all of the matter in the universe - in fact, the universe itself - was contained within a single point (a single point in mathematics is infinitesimally small). A burst of energy known as the Big Bang issued forth, and the universe began. {{Vague}} <ref>http://www.umich.edu/~gs265/bigbang.htm</ref> 1.0×10<sup>-43</sup> seconds later, the force of gravity separated from the other forces. <ref>http://www.ccsf.edu/Departments/History_of_Time_and_Life/content/BigBang.htm</ref>
Scientists refer to the theorized exact moment the Big Bang supposedly began as t=0 ("t" standing for "time"). At this time, according to their theory all of the matter in the universe - in fact, the universe itself - was contained within a single point (a single point in mathematics is infinitesimally small). A burst of energy known as the Big Bang is claimed to have issued forth, and the universe began. {{Vague}} <ref>http://www.umich.edu/~gs265/bigbang.htm</ref> 1.0×10<sup>-43</sup> seconds later, the force of gravity separated from the other forces. <ref>http://www.ccsf.edu/Departments/History_of_Time_and_Life/content/BigBang.htm</ref>
In 2006, researchers used the Wilkinson Microwave Anisotropy Probe (launched by NASA in 2001) to measure variations in the cosmic microwave background (a "faint glow which permeates the universe"). According to these measurements, the universe is estimated to be about 13.7 billion years old, "give or take a few hundred-thousand years".
In 2006, researchers used the Wilkinson Microwave Anisotropy Probe (launched by NASA in 2001) to measure variations in the cosmic microwave background (a "faint glow which permeates the universe"). According to these measurements, the universe is estimated to be about 13.7 billion years old, "give or take a few hundred-thousand years".
<ref>http://www.foxnews.com/story/0,2933,188142,00.html</ref>
<ref>http://www.foxnews.com/story/0,2933,188142,00.html</ref>