Changes

|pages=0:01:46/1:11:39

|pages=0:01:46/1:11:39

|accessdate=2012-10-14

|accessdate=2012-10-14

|url=http://www.youtube.com/watch?v=jWaOyy3WfWk

|url=https://www.youtube.com/watch?v=jWaOyy3WfWk

|quote=Michail S. Turner professor, Kavli institute for Cosmological Physics, University of Chicago: His contributions include Coining the term dark energy ...and several key ideas that lead to dark matter theory of structure formation.}}</ref>  

|quote=Michail S. Turner professor, Kavli institute for Cosmological Physics, University of Chicago: His contributions include Coining the term dark energy ...and several key ideas that lead to dark matter theory of structure formation.}}</ref>  

=== Nature of dark energy ===

=== Nature of dark energy ===

[[Image:DarkMatterNASA1.jpg|300px|right]]Dark energy today is inferred, not detected. The calculated quantity of dark energy is the apparent excess of [[energy]] that somehow abruptly accelerated the expansion of the [[universe]]. Current estimates of the time that has passed since this acceleration occurred vary from 5<ref name=Chaikin>Chaikin, Andrew. "[http://www.space.com/scienceastronomy/astronomy/cosmic_darknrg_020115-1.html Dark Energy: Astronomers Still 'Clueless' About Mystery Force Pushing Galaxies Apart ]." ''Space.com'', January 15, 2002. Accessed July 26, 2008.</ref> to 7.5 billion years.<ref name=Williams>Williams G. "[http://nasascience.nasa.gov/astrophysics/what-is-dark-energy Dark Energy, Dark Matter]." Science Mission Directorate, [[NASA]], May 15, 2008. Accessed July 26, 2008.</ref><ref name=nasa1>Authors unknown. "[http://www.nasa.gov/missions/deepspace/f_dark-energy.html Dark energy changes the universe]." [[NASA]], February 27, 2004. Accessed July 25, 2008.</ref>

[[Image:DarkMatterNASA1.jpg|300px|right]]Dark energy today is inferred, not detected. The calculated quantity of dark energy is the apparent excess of [[energy]] that somehow abruptly accelerated the expansion of the [[universe]]. Current estimates of the time that has passed since this acceleration occurred vary from 5<ref name=Chaikin>Chaikin, Andrew. "[http://www.space.com/scienceastronomy/astronomy/cosmic_darknrg_020115-1.html Dark Energy: Astronomers Still 'Clueless' About Mystery Force Pushing Galaxies Apart ]." ''Space.com'', January 15, 2002. Accessed July 26, 2008.</ref> to 7.5 billion years.<ref name=Williams>Williams G. "[http://nasascience.nasa.gov/astrophysics/what-is-dark-energy Dark Energy, Dark Matter]." Science Mission Directorate, [[NASA]], May 15, 2008. Accessed July 26, 2008.</ref><ref name=nasa1>Authors unknown. "[https://www.nasa.gov/missions/deepspace/f_dark-energy.html Dark energy changes the universe]." [[NASA]], February 27, 2004. Accessed July 25, 2008.</ref>

[[Naturalism|Naturalistic]] cosmologists estimate that 70 percent of the total energy in the universe consists of dark energy.<ref name=Williams/> [[Dark matter]] occupies another 25 percent. The remaining portion is the familiar, or baryonic matter of which all objects are made.<ref name=nasa1/>

[[Naturalism|Naturalistic]] cosmologists estimate that 70 percent of the total energy in the universe consists of dark energy.<ref name=Williams/> [[Dark matter]] occupies another 25 percent. The remaining portion is the familiar, or baryonic matter of which all objects are made.<ref name=nasa1/>