<script>on mouseUpput the short name of this card into xTempput char 2 to 6 of xTemp & ".mov" into Movie--put Movieif Movie is not empty then-- put "Videos:NASA:" & Movie into pMovieplayMovie Movie,"Videos:NASA:"end ifend mouseUp</script>
</part>
<content>
<layer>background</layer>
<id>25</id>
<text><span class="style10">he Universe and Cosmology (2 of 6)</span><span class="style7"></span><span class="style10">The big bang</span><span class="style7">The universe is thought to have originated between 15 000 and 20 000 million years ago in a cataclysmic event known as the </span><span class="style26">big bang</span><span class="style7">. Theoretical models of the big bang suggest that events in the early history of the universe occurred very rapidly.At the beginning of time, the universe comprised a mixture of different subatomic particles, including electrons, positrons, neutrinos and antineutrinos, together with photons of radiation. The temperature was 100 000 million deg C (180 000 million deg F) and its density 4000 million times that of water.One second later, the temperature has dropped to 10 000 million deg C (18 000 million deg F). Matter is spreading out and the density of the universe has fallen to 400 000 times that of water. Heavier particles, protons and neutrons, begin to form.Fourteen seconds later the temperature has dropped to 3000 million deg C (5400 million deg F). Oppositely charged positrons and electrons are annihilating each other and liberating energy. Stable nuclei of helium consisting of two protons and two neutrons begin to form.Three minutes after the creation of the universe, the temperature has fallen to 900 million deg C (1620 million deg F). This is cool enough for deuterium nuclei consisting of one proton and one neutron to form.Thirty minutes later, the temperature is 300 million deg C (540 million deg F). Very few of the original particles remain, most of the electrons and protons having been annihilated by their antiparticles, positrons and antiprotons. Many of the remaining protons and neutrons have combined to form hydrogen and helium nuclei and the density of the universe is about one tenth that of water. Expansion of the universe continues and the hydrogen and helium begins to form into stars and galaxies.</span></text>
</content>
<content>
<layer>background</layer>
<id>26</id>
<text><span class="style10">he big bang theory, </span><span class="style7">is demonstrated in this animation. First matter collapses into the center, then it explodes and expands throughout the universe. Scientific opinions differ on this theory and this is one of many interpretations.</span></text>
</content>
<content>
<layer>background</layer>
<id>23</id>
<text>ΓÇó TIMEΓÇó STARS AND GALAXIESΓÇó THE HISTORY OF ASTRONOMYΓÇó NEWTON AND FORCEΓÇó QUANTUM THEORY AND RELATIVITYΓÇó WAVE THEORYΓÇó OPTICSΓÇó ATOMS AND SUBATOMIC PARTICLES</text>
</content>
<content>
<layer>background</layer>
<id>36</id>
<text>68162026283238</text>
</content>
<content>
<layer>card</layer>
<id>2</id>
<text>004-2.movMessageToolsMessage WatcherVariable WatcherScrollFatBitsPatternsNatureScript of stack guinness:Mac:Nature:Nature</text>