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File - Philosophy, Theology, History, Science, Big
File - Philosophy, Theology, History, Science, Big

... or too little of the bright stuff would expose potential life-forms to either too much or too little light, heat, and radiation, etc. and the production of life essential elements is also affected by this balance. AN EXQUISITE BALANCE: While stars and planets only account for only about 1 percent of ...
What we will do today:
What we will do today:

... • It can also be used to work out speed of each galaxy by recording the distances between galaxies and the time taken to increase these distances when blown. The more you blow up the balloon – the faster the speed ie acceleration. • However, this model shows how the expansion works but it is only a ...
What if Time Really Exists?
What if Time Really Exists?

Euclidean vs Non-Euclidean Geometry
Euclidean vs Non-Euclidean Geometry

... In hyperbolic geometry they "curve away" from each other, increasing in distance as one moves further from the points of intersection with the common perpendicular; these lines are often called ultraparallels. In elliptic geometry the lines "curve toward" each other and  eventually intersect. ...
Computational Capacity of the Universe
Computational Capacity of the Universe

... with respect to the microwave background and one that expands as the Universe expands.) Since the energy remains constant, the number of ops per sec that can be performed by the matter in a comoving volume remains constant as well. The total volume of the Universe within the particle horizon is 艐c3 ...
Thermodynamics of the early universe, v.4 1 Astrophysical units
Thermodynamics of the early universe, v.4 1 Astrophysical units

... height and falls back again. This corresponds to a finite universe. On the other hand, when k = −1, it has positive energy and can escape to infinity. Then we have an infinite universe. In the limiting case k = 0 the particle barely reaches infinity and the universe again has an infinite extent. Ins ...
Study Guide - U.I.U.C. Math
Study Guide - U.I.U.C. Math

...  Poincare and Klein models, including distance formulae  Parallel Axiom in hyperbolic geometry  Angle measure in Poincare model; perpendicularity in Klein model  Limiting parallels  Ideal points and ideal triangles  Angle defect  Saccheri and Lambert quadrilaterals  Area in hyperbolic geomet ...
Modifying Imported CAD Geometry with the Deformed
Modifying Imported CAD Geometry with the Deformed

... Step 2: Partition the Geometry • Add a geometry object to subdivide the imported CAD • Partition, to create additional volumes ...
Lab 15 How Many Galaxies Are There in the
Lab 15 How Many Galaxies Are There in the

... spend 10 entire days training this telescope on one small region of the sky to observe the faintest galaxies and learn about them. The image that was obtained is shown in Figure 15.2. First, let’s figure out how long it would take for the Space Telescope to take pictures like this over the entire sk ...
Document
Document

...  We belong to the Milky Way galaxy – spiral galaxy – 1000,000 light years wide – 10,000 light years thick at the centre – has three distinct spiral arms - Sun is positioned in one of these arms about two-thirds of the way from the galactic center, at a distance of about 30,000 lightyears  The Andr ...
String/M-Theory - Wheaton College
String/M-Theory - Wheaton College

... String/M-Theory as presently understood has a large parameter space of variables (angles between each compactified direction, lengths of each, plus things called fluxes and torques) each leading to universes (observable, hidden, or both) with differing properties. On the order of > 10100 different ...
Archaeology of the Universe
Archaeology of the Universe

Worksheet on Hyperbolic Geometry
Worksheet on Hyperbolic Geometry

... The program KaleidoTile can be found at the website _______________________. Since triangles are ‘thin’ in the hyperbolic geometry setting the symmetry to _____ will put you into the tiling. For a binary tree (part of the hyperbolic plane) each parent has ____ daughters. This means the number of des ...
Introduction to Modern Geometry
Introduction to Modern Geometry

... we really live in a 4-dimensional “spacetime” in which the notions of space and time cannot truly be separated from each other ...
a brief history of time
a brief history of time

... Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it. No matter how many times the results of experiments agree with some theory, you can never be sure that the next time the result will not contradict the theory. On the other hand, you can dis ...
Talk - Otterbein University
Talk - Otterbein University

... • When an electron jumps from one orbital to another, it emits (emission line) or absorbs (absorption line) a photon of a certain energy • The frequency of emitted or absorbed photon is related to its energy ...
Section 19.3
Section 19.3

Chapter 6 The inflationary universe In this chapter, we encounter a
Chapter 6 The inflationary universe In this chapter, we encounter a

... this unified interaction also underwent a phase transition as the universe cooled. Such theories are known as Grand Unified Theories (GUTs). However, one troubling aspect of GUTs is that they predict a universe full of monopoles10, particles which have never been observed. It was an attempt to resol ...
Stars - Stallion Science
Stars - Stallion Science

... • Immediately after, the universe was extremely hot and made up of pure energy • There was a period of rapid expansion that caused the energy to cool, and allowed electrons, neutrons and protons to form • Hydrogen nuclei started to form but it was still too hot for atoms to be stable • About 380,000 ...
Effects of Gravitation
Effects of Gravitation

... and what measurements were available were not consistent with the dynamics of galaxies and clusters of galaxies, see Section 10.3.6. Again, through the Einstein Equations, whether or not the expansion was slowing down or speeding up was connected to the question of whether the average curvature was ...
Expanding Universe Lab
Expanding Universe Lab

Demo: An Expanding universe
Demo: An Expanding universe

... Demo: An Expanding Universe: Background: In fact, the universe is getting even bigger than it already is! Astronomers believe that the universe is expanding - that distant galaxies in the universe are getting farther apart all the time. It's not that stars and galaxies are getting bigger; rather, th ...
Unit 3 - Section 9.7 2011 Universe Origin
Unit 3 - Section 9.7 2011 Universe Origin

... shifting is known as a Doppler shift. By measuring the shift in wavelength, the speed of movement away (red) or towards (blue) Earth can be calculated. When a galaxy is rotating, the starlight from stars on the side of the galaxy that is moving towards are blue-shifted (…think opposite of Red Shift) ...
MATH 498E—Geometry for High School Teachers
MATH 498E—Geometry for High School Teachers

... after class for a reasonable amount of time) Text: College Geometry Using the Geometer's Sketchpad, 1st Edition, Reynolds and Fenton, Wiley Publishing, 2012 or College Geometry, 1st Edition, with Geometer’s Sketchpad v5 Set by Barbara Reynolds, Nov. 2011. Dates: June 26-July 26, Tuesdays and Thursda ...
Hyperbolic Spaces
Hyperbolic Spaces

... In hyperbolic geometry, the sum of the angles of a triangle is less than 180°. In hyperbolic geometry, triangles with the same angles have the same areas. There are no similar triangles in hyperbolic geometry. In hyperbolic space, the concept of perpendicular to a line can be illustrated as seen in ...
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Shape of the universe



The shape of the universe is the local and global geometry of the Universe, in terms of both curvature and topology (though, strictly speaking, the concept goes beyond both). The shape of the universe is related to general relativity which describes how spacetime is curved and bent by mass and energy.There is a distinction between the observable universe and the global universe. The observable universe consists of the part of the universe that can, in principle, be observed due to the finite speed of light and the age of the universe. The observable universe is understood as a sphere around the Earth extending 93 billion light years (8.8 *1026 meters) and would be similar at any observing point (assuming the universe is indeed isotropic, as it appears to be from our vantage point).According to the book Our Mathematical Universe, the shape of the global universe can be explained with three categories: Finite or infinite Flat (no curvature), open (negative curvature) or closed (positive curvature) Connectivity, how the universe is put together, i.e., simply connected space or multiply connected.There are certain logical connections among these properties. For example, a universe with positive curvature is necessarily finite. Although it is usually assumed in the literature that a flat or negatively curved universe is infinite, this need not be the case if the topology is not the trivial one.The exact shape is still a matter of debate in physical cosmology, but experimental data from various, independent sources (WMAP, BOOMERanG and Planck for example) confirm that the observable universe is flat with only a 0.4% margin of error. Theorists have been trying to construct a formal mathematical model of the shape of the universe. In formal terms, this is a 3-manifold model corresponding to the spatial section (in comoving coordinates) of the 4-dimensional space-time of the universe. The model most theorists currently use is the so-called Friedmann–Lemaître–Robertson–Walker (FLRW) model. Arguments have been put forward that the observational data best fit with the conclusion that the shape of the global universe is infinite and flat, but the data are also consistent with other possible shapes, such as the so-called Poincaré dodecahedral space and the Picard horn.
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