How does one figure something like this out? As well as its rate of change, and such things?
There is no way to figure this out considering the universe has not been discoverd for its full extent and probably never will be...whozum said:How does one figure something like this out? As well as its rate of change, and such things?
A_I_ said:can we use the formula of the gamma particle when desiontegrated from uranium to know the age of the universe?
because as i know it travells throughout space and nothing can stop it!?
.whozum said:How does one figure something like this out? As well as its rate of change, and such things?
PF readers may find http://www.eso.org/outreach/press-rel/pr-2001/pr-02-01.html [Broken] of some interest (it's only indirectly related to what SpaceTiger said above) ... "They* measured for the first time the amount of the radioactive isotope Uranium-238 in a star that was born when the Milky Way, the galaxy in which we live, was still forming. It is the first measurement ever of uranium outside the Solar System"SpaceTiger said:This would assume that there was a noticable and large supply of uranium at the beginning of time. However, uranium is generally created in supernova explosions and, since there weren't any stars around at the beginning of time, there was no uranium either. As far as I know, even at the present time there is no strong source of uranium emission in space. A lot of the radiation we see from supernovae, however, is from the radioactive decay of titanium-44 and aluminum-26.
Also, it's not true that nothing can stop gamma-rays. In fact, the reason we can't observe them from the ground is that they're absorbed and scattered in the atmosphere.
Lots of details here - Ned Wright's Cosmology website (includes a calculator).misskitty said:That is really cool. I hadn't heard about it. Would it be possible to predict the diameter of the universe based on that data? Might it be possible to predict the radius of the whole thing?