W
weeman
Guest
Ever since the idea of the "Big Bang" was taken seriously, many astronomers have been searching for evidence supporting that it actually happened.<br /><br />Some evidence we see is the motions of galaxies moving away from us in every direction; also, we are able to witness the cosmic radiation background.<br /><br />However, I would think that the properties of thermodynamics should also be another sign of the Universe starting with with a BANG, and not being infinite. According to scientists, just after the big bang the Universe was very very very very hot. Fractions of a second after the blast, it may have been in excess of a quadrillion degrees Kelvin! Over the next 300,000 years after that, it became much much cooler. <br /><br />This is where I get confused. Many people still speculate that the Universe might be infinite. If all matter in the Universe were infinite, meaning its density is infinite, wouldn't thermodynamics give it infinite heat? How would so many astronomers say that it has cooled since its beginning if it were indeed infinite?<br /><br />If anyone can fill me in on this subject please do <img src="/images/icons/smile.gif" /> <br /><br /> <div class="Discussion_UserSignature"> <p> </p><p><strong><font color="#ff0000">Techies: We do it in the dark. </font></strong></p><p><font color="#0000ff"><strong>"Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.</strong><strong>" -Albert Einstein </strong></font></p> </div>