Can Space be created within space?
in [Physics]
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From: Yousuf Khan on 2 Aug 2010 12:14 On 01/08/2010 12:49 AM, Kali Hawa wrote: > Can a bigbang occur within our Universe? Some theories suggest that everytime a blackhole is created within our universe, that it is actually creating a new universe inside it. Yousuf Khan
From: Sam Wormley on 2 Aug 2010 12:55 On 8/2/10 10:39 AM, Huang wrote: > But I think that Sam is really missing the big picture by simply > refering back to dogma links. You don't know the difference between dogma and science. Take some time for self education and learn the difference. http://en.wikipedia.org/wiki/Dogma "Dogma is the established belief or doctrine held by a religion, ideology or any kind of organization: it is authoritative and not to be disputed, doubted or from which diverged. The term derives from Greek δόγμα "that which seems to one, opinion or belief" and that from δοκέω (dokeo), "to think, to suppose, to imagine". http://en.wikipedia.org/wiki/Science "Science (from Latin: scientia, meaning "knowledge") is a systematic enterprise of gathering knowledge about nature and organizing and condensing that knowledge into testable laws and theories.[1] As knowledge has increased, some methods have proved more reliable than others, and today the scientific method is the standard for science. It includes the use of careful observation, experimentation, measurement, mathematics, and replication — to be considered a science, a body of knowledge must stand up to repeated testing by independent observers". Obviously contraction is not equivalent to expansion. Everywhere we observe, the universe is expanding. No Center http://www.astro.ucla.edu/~wright/nocenter.html http://www.astro.ucla.edu/~wright/infpoint.html Also see Ned Wright's Cosmology Tutorial http://www.astro.ucla.edu/~wright/cosmolog.htm http://www.astro.ucla.edu/~wright/cosmology_faq.html http://www.astro.ucla.edu/~wright/CosmoCalc.html WMAP: Foundations of the Big Bang theory http://map.gsfc.nasa.gov/m_uni.html WMAP: Tests of Big Bang Cosmology http://map.gsfc.nasa.gov/m_uni/uni_101bbtest.html > > If expansion is equivalent to contraction, then we can easily derive > the maximal time segment that can exist in the universe. It is a very > simple calculation, and it's already half done because bigbang > cosmologists have already calculated the age of the universe based on > expansion. Calculate how long it will take to crunch based on > contraction and you have your maximal length possible for a segment of > time. > > > >
From: Sam Wormley on 2 Aug 2010 13:11 On 8/2/10 11:14 AM, Yousuf Khan wrote: > On 01/08/2010 12:49 AM, Kali Hawa wrote: >> Can a bigbang occur within our Universe? > > Some theories suggest that everytime a blackhole is created within our > universe, that it is actually creating a new universe inside it. > > Yousuf Khan Can you cite a reference please!
From: Huang on 2 Aug 2010 15:37 On Aug 2, 11:55 am, Sam Wormley <sworml...(a)gmail.com> wrote: > On 8/2/10 10:39 AM, Huang wrote: > > > But I think that Sam is really missing the big picture by simply > > refering back to dogma links. > > You don't know the difference between dogma and science. Take some > time for self education and learn the difference. > If you have an expansion then something is clearly in motion with respect to something else. I'd like to know why any reasonable person would neccesarily assume that relativistic processes simply dont apply to that.
From: Sam Wormley on 2 Aug 2010 15:59
On 8/2/10 2:37 PM, Huang wrote: > On Aug 2, 11:55 am, Sam Wormley<sworml...(a)gmail.com> wrote: >> On 8/2/10 10:39 AM, Huang wrote: >> >>> But I think that Sam is really missing the big picture by simply >>> refering back to dogma links. >> >> You don't know the difference between dogma and science. Take some >> time for self education and learn the difference. >> > > > If you have an expansion then something is clearly in motion with > respect to something else. > > I'd like to know why any reasonable person would neccesarily assume > that relativistic processes simply dont apply to that. See: Metric expansion of space http://en.wikipedia.org/wiki/Metric_expansion_of_space http://en.wikipedia.org/wiki/Big_Bang#Hubble.27s_law_and_the_expansion_of_space "Hubble's law has two possible explanations. Either we are at the center of an explosion of galaxies�which is untenable given the Copernican Principle�or the Universe is uniformly expanding everywhere. This universal expansion was predicted from general relativity by Alexander Friedman in 1922[14] and Georges Lema�tre in 1927,[15] well before Hubble made his 1929 analysis and observations, and it remains the cornerstone of the Big Bang theory as developed by Friedmann, Lema�tre, Robertson and Walker. "The theory requires the relation v = HD to hold at all times, where D is the comoving distance, v is the recessional velocity, and v, H, and D varying as the Universe expands (hence we write H0 to denote the present-day Hubble "constant"). For distances much smaller than the size of the observable Universe, the Hubble redshift can be thought of as the Doppler shift corresponding to the recession velocity v. However, the redshift is not a true Doppler shift, but rather the result of the expansion of the Universe between the time the light was emitted and the time that it was detected.[43] "That space is undergoing metric expansion is shown by direct observational evidence of the Cosmological Principle and the Copernican Principle, which together with Hubble's law have no other explanation. Astronomical redshifts are extremely isotropic and homogenous,[5] supporting the Cosmological Principle that the Universe looks the same in all directions, along with much other evidence. If the redshifts were the result of an explosion from a center distant from us, they would not be so similar in different directions. "Measurements of the effects of the cosmic microwave background radiation on the dynamics of distant astrophysical systems in 2000 proved the Copernican Principle, that the Earth is not in a central position, on a cosmological scale.[notes 6] Radiation from the Big Bang was demonstrably warmer at earlier times throughout the Universe. Uniform cooling of the cosmic microwave background over billions of years is explainable only if the Universe is experiencing a metric expansion, and excludes the possibility that we are near the unique center of an explosion". |