A NEW METHOD FOR MEASURING EXTRAGALACTIC DISTANCES
... the empirical methods in that it could, in principle, determine H0 through a reasonable model parameterization without resorting to an empirical distance ladder. The Sunyaev–Zel’dovich effect (Birkinshaw 1999) and the use of gravitational lensing (Blandford & Narayan 1986) have been proposed. Howeve ...
... the empirical methods in that it could, in principle, determine H0 through a reasonable model parameterization without resorting to an empirical distance ladder. The Sunyaev–Zel’dovich effect (Birkinshaw 1999) and the use of gravitational lensing (Blandford & Narayan 1986) have been proposed. Howeve ...
Answering the Fermi Paradox - Acceleration Studies Foundation
... the emergence of certain complex forms over time. In other words, our universe is not only enaging in evolution, but appears to be fine-tuned from its initial stages for special types of evolutionary development, including life and intelligence. This universal process of evolutionary development, or ...
... the emergence of certain complex forms over time. In other words, our universe is not only enaging in evolution, but appears to be fine-tuned from its initial stages for special types of evolutionary development, including life and intelligence. This universal process of evolutionary development, or ...
Constraining the Topology of the Universe
... ture: Euclidean space E3 , hyperbolic space H 3 , and spherical space S3 . A useful way to view nontrivial topologies with these local geometries is to imagine the space being tiled by identical copies of a fundamental cell. For example, Euclidean space can be tiled by cubes, resulting in a three-to ...
... ture: Euclidean space E3 , hyperbolic space H 3 , and spherical space S3 . A useful way to view nontrivial topologies with these local geometries is to imagine the space being tiled by identical copies of a fundamental cell. For example, Euclidean space can be tiled by cubes, resulting in a three-to ...
Living Things - Fairfield-Suisun Unified School District
... Our solar system is located in a spiral galaxy called the Milky Way. From the side, the Milky Way appears to be a narrow disk with a bulge in the middle. The galaxy’s spiral structure is visible only from above or below. ...
... Our solar system is located in a spiral galaxy called the Milky Way. From the side, the Milky Way appears to be a narrow disk with a bulge in the middle. The galaxy’s spiral structure is visible only from above or below. ...
20_Testbank
... galaxies. Once we determine the distance to another galaxy for which we have observed a whitedwarf supernova, we then can calibrate the average luminosity of white-dwarf supernovae. White-dwarf supernovae and Cepheids get us far enough away from the Milky Way that we then can calibrate Hubble's law ...
... galaxies. Once we determine the distance to another galaxy for which we have observed a whitedwarf supernova, we then can calibrate the average luminosity of white-dwarf supernovae. White-dwarf supernovae and Cepheids get us far enough away from the Milky Way that we then can calibrate Hubble's law ...
Cosmological models, nonideal fluids and viscous forces in general relativity
... is occupied by the black hole, admits instead invariance under reflection that can be exploited to derive some conclusions about the propagation of gravitational waves in these models. The kinematical quantities like the expansion rate, the shear tensor, the spatial gravito-electric and gravito-magn ...
... is occupied by the black hole, admits instead invariance under reflection that can be exploited to derive some conclusions about the propagation of gravitational waves in these models. The kinematical quantities like the expansion rate, the shear tensor, the spatial gravito-electric and gravito-magn ...
File
... * A long time ago, astronomers thought that the Earth was the centre of the Universe. This was called the geocentric model. The evidence for this model came from observations of the sky using the naked eye. After the telescope was invented, astronomers quickly gathered evidence which showed that the ...
... * A long time ago, astronomers thought that the Earth was the centre of the Universe. This was called the geocentric model. The evidence for this model came from observations of the sky using the naked eye. After the telescope was invented, astronomers quickly gathered evidence which showed that the ...
What We Might Learn from Gravitational Waves
... Quantum fluctuations (tensor in addition to scalar) in the early universe are amplified by inflation. Subsequent phase transitions also might generate GWs Once emitted, GWs travel (almost) unimpeded If detected, give pristine measurement of the very, very early universe: 10-24 seconds, not 400,000 y ...
... Quantum fluctuations (tensor in addition to scalar) in the early universe are amplified by inflation. Subsequent phase transitions also might generate GWs Once emitted, GWs travel (almost) unimpeded If detected, give pristine measurement of the very, very early universe: 10-24 seconds, not 400,000 y ...
PPT
... • Our deepest images of the universe show a great variety of galaxies, some of them billions of lightyears away This is the Hubble Deep Field, a small, apparently blank, piece of sky near the Big Dipper and well out of the Galactic Plane. ...
... • Our deepest images of the universe show a great variety of galaxies, some of them billions of lightyears away This is the Hubble Deep Field, a small, apparently blank, piece of sky near the Big Dipper and well out of the Galactic Plane. ...
Clusters of Galaxies
... He perceived stars being ~100x more luminous intrinsically, thus he thought their distances must be (100)0.5 ~ 10x nearer than they are. Hubble relation (also called “Hubble Flow”) gives us a way to measure the distance of an object knowing only its redshift: v = H0 d ...
... He perceived stars being ~100x more luminous intrinsically, thus he thought their distances must be (100)0.5 ~ 10x nearer than they are. Hubble relation (also called “Hubble Flow”) gives us a way to measure the distance of an object knowing only its redshift: v = H0 d ...
Slides
... The class of logically valid ∀∃p sentences in the language of metric space is decidable. Proof: Taking the negation we look for a decision procedure for the satisfiability of ∃∀p sentences. Let φ ≡ ∃x1 , . . . , xn . ∀ȳ /Qz̄. ψ. Thanks to previous theorem, φ is satisfiable iff exists an interpretat ...
... The class of logically valid ∀∃p sentences in the language of metric space is decidable. Proof: Taking the negation we look for a decision procedure for the satisfiability of ∃∀p sentences. Let φ ≡ ∃x1 , . . . , xn . ∀ȳ /Qz̄. ψ. Thanks to previous theorem, φ is satisfiable iff exists an interpretat ...
PDF format
... White dwarfs that are about to go supernova. The beginning of the universe. We cannot look beyond the cosmological horizon because we cannot look back to a time before the universe began. ...
... White dwarfs that are about to go supernova. The beginning of the universe. We cannot look beyond the cosmological horizon because we cannot look back to a time before the universe began. ...
Document
... Fifteen years ago, a quasar was observed that was found to be located 8 billion light years away. If our universe is approximately 15 billion years old, when did the quasar emit the light that we observe? A. 15 years ago B. 7 billion years ago C. 8 billion years ago D. 15 billion years ago ...
... Fifteen years ago, a quasar was observed that was found to be located 8 billion light years away. If our universe is approximately 15 billion years old, when did the quasar emit the light that we observe? A. 15 years ago B. 7 billion years ago C. 8 billion years ago D. 15 billion years ago ...
script
... Background: Very few people have a comprehensive view of our place in the universe. They think about astronomical objects as disconnected elements, rather than an integrated system. This demonstration takes visitors from our Solar System, the part of the universe with which they are most familiar, o ...
... Background: Very few people have a comprehensive view of our place in the universe. They think about astronomical objects as disconnected elements, rather than an integrated system. This demonstration takes visitors from our Solar System, the part of the universe with which they are most familiar, o ...
1 Chapter 1: Our Place in the Universe
... How far away are the stars? How big is the Milky Way Galaxy? How big is the Universe? How do our lifetimes compare to the age of the Universe? ...
... How far away are the stars? How big is the Milky Way Galaxy? How big is the Universe? How do our lifetimes compare to the age of the Universe? ...
22_Testbank
... C) You are in an accretion disk around a supermassive black hole. D) You are in the central regions of a quasar. E) You are where the Sun should be located, but about 5 billion years from now. Answer: A 32) You are feeling like spaghetti. Although normally only about 2 meters tall, you are now about ...
... C) You are in an accretion disk around a supermassive black hole. D) You are in the central regions of a quasar. E) You are where the Sun should be located, but about 5 billion years from now. Answer: A 32) You are feeling like spaghetti. Although normally only about 2 meters tall, you are now about ...
Module 4.1 - The Scale of the Universe [slide 1] We now turn to
... [slide 5] Ever since then, the value of the Hubble constant was revised, usually downward. The first major revision was due to Walter Baade who recognized that there are really two very different kinds of pulsating stars, one of which is confused for the other, and he came up with the concept of ste ...
... [slide 5] Ever since then, the value of the Hubble constant was revised, usually downward. The first major revision was due to Walter Baade who recognized that there are really two very different kinds of pulsating stars, one of which is confused for the other, and he came up with the concept of ste ...
CHAPTER 4 THE SPATIAL DISTRIBUTION OF GALAXIES 4.13
... Having looked at the properties of individual galaxies – both normal and active – in some detail, it is now appropriate to consider how these galaxies are distributed in space. Surveys of the region outside our own Milky Way show that there are galaxies all around us. Deep field images such as those ...
... Having looked at the properties of individual galaxies – both normal and active – in some detail, it is now appropriate to consider how these galaxies are distributed in space. Surveys of the region outside our own Milky Way show that there are galaxies all around us. Deep field images such as those ...
Physical Relativism as an Interpretation of Existence
... [45], to planet mass [57], composition, orbit distance [35], stability [46], early geochemistry conditions [53] and many other factors [37]. If all of these properties were chosen at random, without any overall guiding influence or purpose, then the probability of achieving conditions amenable to li ...
... [45], to planet mass [57], composition, orbit distance [35], stability [46], early geochemistry conditions [53] and many other factors [37]. If all of these properties were chosen at random, without any overall guiding influence or purpose, then the probability of achieving conditions amenable to li ...
Slides_Pisin_Chen
... After completing his formulation of general relativity (GR), Einstein (1917) introduced a cosmological constant (CC) to his eq. for the universe to be static: ...
... After completing his formulation of general relativity (GR), Einstein (1917) introduced a cosmological constant (CC) to his eq. for the universe to be static: ...
The Static Universe of Walther Nernst
... hope; there is nothing for it but to collapse in deepest humiliation.” Yet the observational evidence necessitates precisely such a theory. In the modern cosmological data, there is nothing whatsoever to support a global increase of entropy. Distant galaxies observed as they were long ago are simila ...
... hope; there is nothing for it but to collapse in deepest humiliation.” Yet the observational evidence necessitates precisely such a theory. In the modern cosmological data, there is nothing whatsoever to support a global increase of entropy. Distant galaxies observed as they were long ago are simila ...
PHY 375 - DePaul University
... We will use the full relativistic Doppler effect formula to avoid faster than light recession velocity (but see posted lecture notes about why this step angers theoreticians, especially because faster than light motions are not a problem in general relativity; in fact, the preference is to keep dist ...
... We will use the full relativistic Doppler effect formula to avoid faster than light recession velocity (but see posted lecture notes about why this step angers theoreticians, especially because faster than light motions are not a problem in general relativity; in fact, the preference is to keep dist ...