"Hubble Ultra Deep Field"
A look back in time nearer to the "Big Bang"
According to the commonly accepted theory of the big bang, approximately 13.73 ± 0.12 billion years ago, the universe started expanding from an infinitesimally small point into the visible universe that we know of today, over 93 billion light years wide. After one Planck time (about 5.39124*10^(-44) seconds), gravity separated from the electronuclear force. After one picosecond (1.00*10^(-12) seconds), the “weak” force separated from the electromagnetic force resulting in the four forces we know today. By one hour, helium nuclei formed. In 370,000 years, hydrogen and helium nuclei captured electrons and formed stable atoms. By 100 million years after the big bang, the first stars began to shine. It may seem surprising, but all of the energy in our universe at this moment, was present from the very beginning. Some of what I have learned during this unit about energy is explained in the following "Glog":
Energy - The Fuel of the Universe
Attributions:
Big Bang Technical Information: http://en.wikipedia.org/wiki/Big_Bang, http://en.wikipedia.org/wiki/Graphical_timeline_of_the_Big_Bang
Hubble Ultra Deep Field Photo: http://en.wikipedia.org/wiki/File:Hubble_ultra_deep_field_high_rez_edit1.jpg
