Ask The Experts: Astronomy And Astrophysics Has anyone ever calculated how far we are from the point of the big bang? Whatis the basic difference between Astrophysics and Astronomy? http://www.physlink.com/Education/AskExperts/ae_astro.cfm
Topic Big Bang Nucleosynthesis big bang Nucleosynthesis and the Missing Hydrogen Mass in the Universe. DC Choudhuryand David W. Kraft, Nuclear and Particle Astrophysics at CIPANP 2003. http://topics.aip.org/2635 .html
Glossary Check out these CfPA cosmic microwave background links Max and Minima; CMB astrophysicsresearch page; big bang cosmology primer. The cosmic microwave background. http://cosmology.berkeley.edu/Education/IUP/GlossaryA_E.htm
Extractions: Active Galactic Nuclei (AGN) A galaxy which emits a huge amount of energy from a compact central source. Active Galactic Nuclei Andromeda Galaxy The Andromeda galaxy is the largest of the local galaxies, and is visible to the unaided eye. It is about 2 million light years from our own galaxy and has a beautiful spiral structure. The Andromeda galaxy is also known as M31. The Andromeda galaxy and the Milky Way galaxy will eventually collide. Asteroid
Big Bang Cosmology Primer A possible explanation is that right after the big bang the Universe as inflationtheory, and has widespread advocacy within the astrophysics community because http://cosmology.berkeley.edu/Education/IUP/Big_Bang_Primer.html
Extractions: Our understanding of the Universe has greatly increased over the past few decades. The current model of how the Universe formed is known as the Big Bang theory . This article discusses the highlights of that theory. The steady state theory of cosmology claims that the Universe simply exists without changing with time. This theory presents many physical as well as philosophical difficulties. Evidence suggests that the Universe is expanding . While there are ways to explain expansion in a steady state universe, few astrophysicists believe this theory, because there is little evidence to support it. As the first widely held theory about the Universe it is included here for historical completeness. The big bang theory states that at some time in the distant past there was nothing. A process known as vacuum fluctuation created what astrophysicists call a singularity. From that singularity, which was about the size of a dime, our Universe was born. It is hard to imagine the very beginning of the Universe. Physical laws as we know them did not exist due to the presence of incredibly large amounts of energy, in the form of
Quantum Astrophysics - Big Bang BUSTERS! B.What came before the big bang is metaphysical or can t be known. It isunscientific and has no place in cosmology or quantum astrophysics. http://members.tripod.com/~SDAI_labs/BIG.html
Extractions: While it may seem 'fashionable' to believe in a 'big bang' origins to the universe, it is in reality one of the greatest fallacies perpetuated in science today. Perhaps you know someone who says, 'The universe was created in the big bang.' - maybe a colleague, teacher or parent. Here are some things to point out to them: The SDAI LABS Big Bang Busters! C. There you have it - three simple big bang busters. The physics many astrophysicists use to describe the conditions of the early universe - almost qualify as ridiculous. The explanations you will get in response to your newly acquired cosmological knowledge will sometimes be amusing, the most common are presented here: A.
Big Bang Nucleosynthesis K. Jedamzik A Brief Summary of NonStandard big bang Nucleosynthesis Scenarios InProc. Neutrino Astrophysics, Ringberg Castle, Tegernsee, Germany, 20-24 Oct http://www.mpa-garching.mpg.de/~jedamzik/bbn/bbn.html
Extractions: Big Bang Nucleosynthesis Virtually all Deuterium and the bulk of Helium-4 found in the universe was created just a few seconds after the Big Bang, about 10-15 billion years ago. This process is called Big Bang Nucleosynthesis. In the standard scenario, the final abundances depend only on one parameter, namely the cosmic matter density. J. B. Rehm: The Influence of Matter-Antimatter Domains on Big Bang Nucleosynthesis
ELA Physics Directory ASTRONOMY§, Astrophysics, Relativity, Varying c Martin White s Online Publications( Astronomy Dept, U California, Berkely) big bang Cosmic Rosetta http://home.att.net/~gallgosp/physics.htm
Huuhaatiedettä: Big Bang Oldershaw, The Continuing Case for a Hierarchical Cosmology, 92 Astrophysics SpaceScience 347, 357 (1983). Todistusaineisto big bangkosmologian puolesta on http://www.helsinki.fi/~pvalimak/pamaus.html
Extractions: "Täytyy sivuuttaa, lakaista maton alle, muutamia vakavia ongelmia, joita tämä teoria tuskin koskaan ratkaisee... En juuri epäröi sanoa, että tämän tuloksena kuolema leijuu big bang-teorian yllä. Kuten olen aikaisemminkin sanonut, kun tosiasiat puhuvat jotain teoriaa vastaan, se harvoin selviytyy." F. Hoyle, The Intelligent Universe: A New View of Creation and Evolution 179, 186 (1983)
Astrophysics And Cosmology At Florida State University Nuclear Astrophysics is the research field which explains the origin of the elementsand We know that Hydrogen was formed shortly after the big bang and that http://www.physics.fsu.edu/Research/Astrophysics/AstroPhysics.html
Superconducting Cameras To Photograph The Big Bang such as studying the very earliest moments of the big bang, finding galaxies signingof an agreement between Oxford Instruments and the Astrophysics Group in http://www.oxinst.com/SCNNWP509.htm
Extractions: drawHeader('4', 'FFC800', 'image_superconductivity.jpg', 'superconductivity', ''); Superconducting cameras to photograph the Big Bang Major scientific advances, such as studying the very earliest moments of the Big Bang, finding galaxies beyond the edge of the currently observable universe, creating the next generation of x-ray astronomy satellites, through to sub-cellular imaging of DNA and other biological materials are all now a step closer. This follows the signing of an agreement between Oxford Instruments and the Astrophysics Group in Cambridge University's Cavendish Laboratory, to create a new laboratory. The 20-year agreement combines two of the UK's leading superconducting detector groups and their complementary areas of expertise to establish a new single low temperature electronics facility to be located at the Cavendish Laboratory in Cambridge. The facility will allow the combined team to create a new generation of analytical techniques for the physical and biological sciences. The team will develop advanced superconducting detectors and optical components for the whole of the electromagnetic spectrum. Steve McQuillan, Managing Director of Oxford Instruments Superconductivity said, "This agreement is of international significance since it brings together world class skills to work synergistically to advance superconducting detectors."
Some Big Bang Supporting Assertions Challenged his paper A cosmological model without singularity, (Astrophysics and Space Science,vol. 207, no. 2, September 1993, pp. 203219). big bang supporters Sten http://home.pacbell.net/skeptica/
Extractions: If one has a belief that the universe is, or should be, a certain way, it is only natural that one gives importance to corroborating evidence or arguments that enhance the prejudice. None of us are without our influences, whether they be cultural, religious, idealist, materialist or whatever. My personal prejudice is that of atheistic materialism; of a universe infinite in space and time; in eternal motion; and, of the conservation of matter and energy. Now for a few arguments by Big Bang creationist boosters for a finite expanding universe. The pro arguments are from George Smoot and Keay Davidsons book Wrinkles in Time . The con arguments are not found in their book, which is suggestive of their prejudice for a created universe. The pro arguments are not necessarily their arguments, but since they treat the argument as valid without giving criticism, it is included as a
Collapse Of The Big Bang Theory and John Huchra, of the HarvardSmithsonian Center for Astrophysics, announced the ontheir speed of movement, if produced by the standard big bang cosmology. http://www.icr.org/pubs/imp/imp-216.htm
Extractions: Institute for Creation Research. All Rights Reserved Based on the Big Bang theory, cosmologists predicted that the distribution of matter throughout the universe would be homogeneous. Thus, based upon the so-called Cosmological Principle, it was postulated that the distribution of galaxies in the universe would be essentially uniform. No matter in which direction one looked, if one looked far enough, one would see the same number of galaxies. There would be no large scale clusters of galaxies or great voids in space. Recent research, however, has revealed massive superclusters of galaxies and vast voids in space. We exist in a very "clumpy" universe. The present crisis in Big Bang cosmologies began in 1986, when R. Brent Tully, of the University of Hawaii, showed that there were ribbons of superclusters of galaxies 300 million light-years long and 100 million light-years thick, stretching out about a billion light-years, and separated by voids about 300 million light-years across.[1] These structures are much too big for the Big Bang theory to produce. At the speeds at which galaxies are supposed to be moving, it would require 80 billion years to create such a huge complex, but the age of the universe is supposed to be somewhere between 10 and 20 billion years.
Cosmic Microwave Background Radiation And The Big Bang Theory 1 F. Flam, COBE finds the bumps in the big bang, Science 256 B. Zel dovich, Smallscalefluctuations of relic radiation, Astrophysics and Space Science 7 http://www.icr.org/pubs/imp/imp-233.htm
Extractions: Institute for Creation Research. All Rights Reserved What Is the Cosmic Microwave Background Radiation? In 1964, two Bell Laboratories scientists, Arno Penzias and Robert Wilson, accidentally discovered that the earth is bathed in low-intensity microwave electromagnetic radiation coming equally from all directions. The intensities and wavelengths of these microwaves are characteristic of thermal radiation Everything emits thermal radiation. Any object at a particular temperature emits thermal radiation with a particular set of intensities and wavelengths. For example, a white-hot light bulb filament at 3000
La Théorie Du Big Bang Translate this page En effet, peu de temps après le big bang, lorsque le rayonnement dominait encorela matière, la 4 Y.Zeldovitch, Astronomy and Astrophysics, 5, 1970, p84. http://www.astrosurf.com/lombry/cosmos-bigbang.htm
Extractions: La théorie du Big Bang Les lois de la nature (I) Combien peut-il exister de lois applicables aux phénomènes cosmologiques et qui soient régies par la gravitation et sous lemprise du temps ? Probablement la majorité. Je vous en propose quatre qui n'ont pas de bornes, mais dont l'intensité peut osciller au cours de l'évolution de l'Univers. Ces équations ont une portée universelle et nous permettront de mieux comprendre les principes de lexpérience du Big Bang. Le facteur d'échelle Depuis les 1980 nous savons que la théorie selon laquelle les galaxies sont uniformément distribuées doit être nuancée car les galaxies se regroupent en fait en amas , formant une sorte de maillage régulier, troués d'espaces vides à l'échelle de quelques millions d'années-lumière. Il faut observer le ciel à l'échelle du milliard d'années-lumière pour retrouver une répartition homogène des galaxies. De ce principe cosmologique découle que les distances entre les galaxies peuvent être déterminées uniquement en fonction de l'expansion de l'Univers, facteur qui bien sûr changera au cours du temps : c'est le "facteur d'échelle" qui représente le rayon de l'Univers ou plus exactement la séparation entre deux galaxies quelconques. Méfions-nous cependant de la gravité car nous savons qu'elle peut ralentir l'expansion et modifier localement la vitesse des objets.
Session Q16 - Astrophysics: Student Prize Talks. Q16 Astrophysics Student Prize Talks. MIXED session, Monday afternoon, May 01202C, LBCC. Q16.001 Expanding the Capabilities of a big bang Nucleosynthesis http://www.eps.org/aps/meet/APR00/baps/abs/S5750.html
Extractions: 202C, LBCC Juan Lara (Center for Relativity / University of Texas at Austin) Stuart Wick (Vanderbilt University) Any early universe phase transition occurring after inflation has the potential to populate the universe with a flux of magnetic monopoles. Observations of galactic magnetic fields, and models for extragalactic magnetic fields, lead to the conclusion that monopoles of mass S.M. Niebur, W.R. Binns, P.L. Hink, M.H. Israel, J. Klarmann, M. Lijowski (Washington University), E.R. Christian, T.T von Rosenvinge (NASA/Goddard Space Flight Center), A.C. Cummings, J.S. George, R.A. Leske, R.A. Mewaldt, E.C. Stone (California Institute of Technology), M.E. Wiedenbeck, N.E. Yanasak (Jet Propulsion Laboratory) Secondary galactic cosmic rays are produced at cosmic ray energies by fragmentation of primary cosmic rays during propagation through the interstellar medium; these nuclei carry a signature of the energy at which they were produced. Although electron-capture decay is inhibited at most of the energies typical of cosmic rays, decay is possible at the lower energies for isotopes such as 51Cr and 49V. We have analyzed Titanium, Vanadium, and Chromium isotopic data from the Cosmic Ray Isotope Spectrometer on ACE and found evidence of electron-capture decay at lower energies. We will present a comparison of secondary electron-capture decay isotope abundances and abundances of their decay products with results from improved propagation models in order to discuss the amount of electron-capture decay and subsequent acceleration that may have occurred during propagation.
Extractions: Aztec, Albuquerque Convention Center Max Tegmark (University of Pennsylvania) I summarize the latest constraints on dark matter and dark energy from the cosmic microwave background, large-scale structure, lensing, LyA forest clustering, etc, focusing on the following questions: By postulating complicated unseen matter with sufficiently many free parameters, one can fit almost any observational data, so how can we test the underlying physics in a model-independent way? What current and upcoming cosmological constraints can be robustly connected with dark matter properties that can be probed experimentally? Eric Gawiser (Physics Dept., U.C. San Diego) The Hot Big Bang plus inflation is the standard model of the early universe. I will present a new cosmological model which uses the observed cosmic dark energy as initial conditions for an inflationary phase which mimics a Hot Big Bang. This inflationary phase (dubbed rejuvenation) will be produced if the effective cosmological constant increases with time. The universe undergoes superexponential expansion until it resumes radiation domination, leaving it identical to a Hot Big Bang in all measurable respects but avoiding an initial singularity. This process can produce adiabatic density perturbations as favored by recent observations of Cosmic Microwave Background anisotropy, although a blue tilt to the primordial power spectrum is predicted.
