News By Michael March 19th - 1140 PM Few Announcements we've won a war with the math club ) Only (Astro)physics will prevail ). the scientistsfirst found the evidence that confirmed the big bang theory through http://astronomy.njit.edu/main.html
Richard Fisher the development and current state of the central tenet of astro physics and cosmology itsorigin about 15 billion years ago in the singularity of the big bang. http://www.lfc.edu/~fisher/
Majoring In Astronomy At The University Of Virginia astronomy has been to gather them all into a rich and coherent picture, one whichdepicts the origin and evolution of all things from the big bang to the http://www.astro.virginia.edu/class/major.html
Extractions: Undergraduate Degree Programs OVERVIEW Although the study of astronomy has ancient roots, it is now one of the most rapidly developing and exciting subjects in modern science. Astronomy is the study of the Universe and its contents: planets, stars, black holes, galaxies, and quasars. Each of these is a fascinating topic in its own right. But perhaps the greatest achievement of modern astronomy has been to gather them all into a rich and coherent picture, one which depicts the origin and evolution of all things from the Big Bang to the development of living organisms. Recent advances in astronomy have derived from new technologies that have yielded instruments of unprecedented power: telescopes with 10-meter mirrors, orbiting satellite observatories for all parts of the electromagnetic spectrum, deep space missions to sample planetary atmospheres and surfaces, and huge laboratories for detection of elusive cosmic neutrinos and gravity waves. The excitement and accessibility of astronomy are featured in frequent press coverage of major new discoveries, including in recent years the discovery of planets orbiting other stars, the comet crash onto Jupiter, the discovery of very young galaxies in the distant universe, the possibility of life on Mars, the threat of asteroid collisions with the Earth, and the detection of primeval ripples in the cosmic background radiation. Astronomy draws from, and contributes to, many other subjects: primarily physics but also geology, atmospheric and environmental science, biology, and even philosophy.
Faculty Of Physics And Astronomy Content This course treats various aspects of the (astro)physics of neutron stars. Cosmologythe hot big bang model, the Robertson Walker metric, Primordial http://www1.phys.uu.nl/masters/astromaster/CourseDescriptions.htm
Extractions: Astrophysics: Course Descriptions Lecturer(s): Prof.Dr. Frank Verbunt Content: Our knowledge of stars is based on a careful analysis of observational data. Such data-analysis demands detailed knowledge about the nature of the incoming signal, and of the properties of the devices used in the observation. The stochastic nature of signals, the limited spectral and spatial resolution of any telescope and the limited duration of an observation put strong constraints on the data analysis. This course treats the physical background of the analysis of astronomical data, and the possibilities and limitations that the observing conditions impose. It aims to give the student the necessary background and insight needed for the reliable application of the different astronomical data-analysis packages that are available. An assignment course is an integral part of this course. The assignments are designed to teach the student the necessary programming and visualisation skills, and serve as an introduction to the program library of Numerical Recipes Material used: t.b.a.
Overview Detail The observations of very distant galaxies show that galaxies formed justone billion years after the big bang, which occurred 15 billion years ago. http://www.rccp.tsukuba.ac.jp/Astro/overview.html
Extractions: There are a number of open questions concerning the formation of galaxies and stellar/planetary systems. The astrophysics group at the Center pursues research on the formation processes of such objects, which requires large scale numerical simulations. Detail The observations of very distant galaxies show that galaxies formed just one billion years after the Big Bang, which occurred 15 billion years ago. The measurements of the cosmic background radiation have revealed that the early universe was extremely homogeneous. The discrepancy between the smoothness of the cosmic background radiation, and the highly nonlinear structures like galaxies seen today, could be reconciled in terms of dark matter. Also, it is widely accepted that the event of the reionization of the universe took place at the so-called dark age of the universe, say redshifts z>5, because the intergalactic medium (IGM) is observed to have been highly ionized at redshifts z <5. How the universe was reionized is an issue of great interest as well as significance in the light of the near future observations by dozens of potential facilities which would gradually unveil the dark age, in particular the formation of galaxies and quasars. Active Galactic Nuclei [ Detail How the activities of quasars and active galactic nuclei are triggered is a long-standing issue. We consider a novel radiative mechanism due to a circumnuclear starburst. Also, there are recently accumulated a lot of evidences that a massive black hole inhabits the center of a galaxy. The formation of massive black holes is a significant issue in relation to QSO/AGN activities. We pursue the formation of galaxies and massive black holes in dark matter-dominated universes.
Astrophysics calculations, such as nucleosynthesis, stellar evolution, the big bang, and super CategoryScience Physics Astrophysics http//wwwastro.physics.uiowa.edu http://www.ad.com/Science/Astronomy/__Astrophysics/
The Ontology Of Self-existent Objects ias.edu, mfrank@math.uchicago.edu, psj@tifr.res.in, shapiro@astro.physics.uiuc.edu inthe universe (eg if the original topology after the bigbang was multiply http://members.aon.at/chakalov/Romero.html
Extractions: Dear Professor Romero, I'm reading your recent article "Chronology violation and the Cosmological Argument" [ Ref. 1 ] with great interest. Do CTCs and wormholes exist? The whole issue is utterly unclear to me [ Ref. 2 http://members.aon.at/chakalov/Brun.html#2 You suggested that gravitational lensing of background sources can be interpreted as an effect of natural wormholes (p. 5). May I suggest a bit different test. Can you tell the difference between causal anomalies from naked singularities, and causal anomalies from CTCs? I can't. They are like two sides of one coin. The end result will be the same IMHO. So, it seems to me that CTCs from multiple-connected spacetimes would have resulted in a genuine naked singularity, with all catastrophic events, just as in the case of simply-connected spacetime [
What Is Astronomy To You? : Sciforums.com have no carreer in the field, I love reading popular ((theoretical) astro) physics. howthe stuff works,reacts,becomes black holes, big bang, gravitons, pulsars http://www.sciforums.com/archive/6/2002/12/2/13153
Will Saunders In the standard bigbang model for the Universe, structure arises from quantumfluctuations See http//www-astro.physics.ox.ac.uk/~wjs/pscz.html for more http://www.roe.ac.uk/willwww/
Extractions: Royal Society Research Fellow In the standard Big-Bang model for the Universe, structure arises from quantum fluctuations during the inflationary epoch, and gravity does the rest. Different recipes for the constituents of the Universe lead to different predictions for the statistics of galaxy clustering and dynamics, while comparing predicted and observed peculiar velocities allows us to find how light relates to mass. For dynamical studies, we need the greatest uniformity and sky coverage possible. Because of this, the most useful surveys have been constructed from data taken by IRAS (the Infra-Red Astronomical Satellite) in the early eighties. I am involved with a large UK collaboration in the now completed Point Source Catalog Redshift Survey of 15,000 galaxies; the sky distribution of the galaxies is shown below. See http://www-astro.physics.ox.ac.uk/~wjs/pscz.html for more information. Postscript version Most of the structure in this map is washed out by projection efects. The three-dimensional distribution of galaxies, including a novel interpolation algorithm across the Milky Way, is shown below. Each frame represents the density on a spherical shell panning out through the volume of the survey. Note (a) how both over- and under-dense regions are multiply connected, and (b) how the map becomes strikingly more uniform with distance (and hence scale). Both these features are primary predictions of inflationary cosmology.
ROG: Cosmology When we think of the big bang we instinctively think of the small Universe expanding www.ast.cam.ac.uk/HST/;University of Oxford http//wwwastro.physics.ox.ac http://212.219.145.17/leaflets/cosmology/cosmology.html
Extractions: Astronomy Leaflets Visitors Events ... astroline@nmm.ac.uk Search the Information Leaflets Space The Planets Stars The Universe ... Links The Universe Evidence for the Big Bang Predictions from the Big Bang Results from the COBE satellite and the BOOMERANG experiment ... Further information In the 1920s Edwin Hubble showed that, on the largest scales, all the galaxies were moving away from each other. It is simple to deduce from this that at some time in the past they must have been much closer together than they are now. Cosmology is the study of the origin and development of the Universe and the currently most popular theory is that of the Big Bang. This theorises that at about 13,000,000,000 years ago all the matter and space that make up the Universe were concentrated into a very small volume. The theory states that the Universe came into being as an extremely small volume full of energy, which gave the Universe a very high temperature. As the Universe expanded so the fundamental atomic particles were formed as a mixture dominated by hydrogen with some helium and almost nothing else. Some of the greatest current problems in astrophysics arise from consideration of how the galaxies formed, and what is the nature of the mass of the Universe (we can only identify 10 percent of what must be there!).
Assignment 5 big bang nucleosynthesis, explaining the key events, processes, and basic scalings.Imagine that you were trying to explain the event to another (astro)physics http://cmb.as.arizona.edu/~eisenste/ast541/assignment5/assignment5.html
Extractions: Problem (not to be turned in): From the problem 4 of last week, note that the WMAP satellite claims to have measured this optical depth to be . If you generalize your formula to allow (this is an easy change if you assume that the contribution to the integral is negligible except when ), then you can convert this to a reionization epoch just as the WMAP team did! Problem 1 (5 pts): Consider the relic population of neutrinos. I argued in class that at MeV neutrinos (and antineutrinos) interact quickly enough that they are populated at their thermal abundances. At MeV, the neutrinos stop interacting with the rest of the particles. After that time, the annihilation of the electrons and positrons heats the photons to a temperature that is higher than the temperature of the neutrinos. a) Knowing that the CMB temperature today is 2.725 Kelvin, compute the combined number density of neutrinos and antineutrinos per species today. Remember that a thermal distribution of fermions has 3/4 as many particles as a thermal distribution of bosons at the same temperature. Assume a zero chemical potential throughout. b) If the neutrino (and its antiparticle) has a small mass today, then this mass is negligible for the decoupling process at 1 MeV and so the number density is unchanged. Compute the value of
DINO - Language: Englisch - Science - Physics - Astrophysics calculations, such as nucleosynthesis, stellar evolution, the big bang, and super http//wwwastro.physics.uiowa.edu/~lam/research/rings/- Verwandte Websites. http://www.dino-online.de/dino_page_5975eec77a4ac016fc435df99ba89f05.html
SETI Mailing List - Archive By Thread The sentencing of Galileo and the big bang MarcusJohn@aol Fear. SETI RE ASTRO VLAand big Ear Larry SETI FW ASTRO Physics News Update September 15, 1998 http://seti.sentry.net/archive/public/1998/9-98/
Extractions: Messages: Re: SETI Yet another hare-brained scheme for building an antenna Corey Ashford Re: SETI Yet another hare-brained scheme for building an antenna rtyndall@juno.com SETI Re: ARGUS Seti Logo David Ocame SETI Re: your mail David Woolley Re: SETI modulation of ETI transmission David Woolley Re: SETI frequencies in Contact Corey Ashford SETI Argus station Don Adams SETI Re: Contact frequencies Dr. H. Paul Shuch SETI Re: Contact frequencies Dr. H. Paul Shuch SETI FW: [ASTRO] The NICMOS Cryocooler Larry Klaes SETI article in Wired Magazine Larry Klaes Re: SETI frequencies in Contact Malcolm Mallette SETI liquid nitrogen pool telescope Ron Blue SETI recievers Matthew G Cheung SETI Lynett Cook's Art Web site Larry Klaes Re: SETI liquid nitrogen pool telescope Ray Shank RE: [ASTRO] SETIWHENEVER - Apollo 12/Surveyor 3/microbes Larry Klaes Re: SETI recievers Greg Preston Re: SETI modulation of ETI transmission Daniel Boyd Fox SETI FW: [ASTRO] Earth Microbes On The Moon Larry Klaes SETI receivers Matthew G Cheung SETI Re: liquid telescope Randy Stegemeyer SETI recievers Edward R. Cole
CELTICA CAT data for astrophysics calculations, such as nucleosynthesis, stellar evolution, theBig bang, and supernova urlwwwastro.physics.uiowa.edu/~lam/research/rings http://www.celticsurf.net/odp/index.cgi?base=/Science/Physics/Astrophysics/
Astronomy sdss.org/news/releases/19980608.fl.html images astronomy http//wwwastro.physics.uiowa.edu http//sciastro.astronomy.net/sci.astro.9.FAQBig bang info =* http http://www.kheper.net/cosmos/astronomy/astronomy.htm
Boop.ca Everyone's Portal data for astrophysics calculations, such as nucleosynthesis, stellar evolution, theBig bang, and supernova url wwwastro.physics.uiowa.edu/~lam/research/rings http://www.boop.ca/boop/cgi-bin/odp/index.cgi?base=/Science/Physics/Astrophysics
ASP: The Biggest Bang Of Them All that theory will answer the questions about beyond and before. But even if theBig bang theory is His email address is philippe@astro.physics.lsa.umich.edu http://www.astrosociety.org/education/publications/tnl/37/universe3.html
Extractions: The Growing Universe To visualize what Hubble's law means, take a balloon and draw some dots on it. As you inflate it, you can see that the distance between every pair of dots increases. Let out the air, catch your breath, and repeat the experiment. Imagine that you are one of the dots looking at the other dots. From the dot's point of view, the other dots all seem to be getting farther away, like ships sailing from a harbor in different directions. It doesn't matter which dot you pick; each dot sees the same thing. Based on this simple analogy, scientists deduced that Hubble's law is exactly what you'd expect if the universe were expanding. Galaxies in the expanding universe are like dots on the inflating balloon, or ships in an immense ocean that keeps getting bigger with time. Of course, things are a little different in the real universe. We are not on the (two-dimensional) surface of a balloon. It is our three-dimensional universe that is expanding. We cannot see it from the outside, as in the case of the balloon. This is a perfect example of how our inability to escape the universe limits our view. Sometimes it is impossible for us to visualize what is going on, and scientists are reduced to talking in purely mathematical terms. The Hubble constant is one of most important numbers in cosmology. Going back to Hubble's law, you can see that the constant is velocity divided by distance. Since velocity itself is distance divided by time, the inverse of the Hubble constant is simply time. This time, it turns out, is the approximate age of the universe.
