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whozum
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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 travels 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 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?
Scientists use a variety of methods to measure the size of the universe, including triangulation, redshift, and cosmic microwave background radiation. These methods involve observing and measuring the distances and movements of objects in the universe.
Due to the vastness and complexity of the universe, it is impossible for scientists to determine the exact size. However, through advanced technology and mathematical calculations, scientists have estimated the observable universe to be about 93 billion light-years in diameter.
Throughout history, our understanding of the size of the universe has evolved as our technology and knowledge have improved. From ancient civilizations believing the Earth to be the center of the universe, to modern-day scientists using advanced telescopes and instruments to study the vastness of space.
Yes, there are several theories and models that attempt to explain the size of the universe. Some of the most well-known include the Big Bang theory, which suggests that the universe began as a singularity and has been expanding ever since, and the inflationary model, which proposes that the universe experienced a rapid period of expansion shortly after the Big Bang.
Studying the size of the universe allows scientists to better understand the origins, structure, and evolution of the universe. It also helps us gain insight into the fundamental laws of physics and the potential for other habitable planets or life forms beyond our own. Additionally, studying the size of the universe can lead to technological advancements and innovations that benefit our daily lives.