A105 Stars and Galaxies
... • Weak lensing - distortions are much smaller – Detected by analyzing large numbers of objects to find distortions of only a few percent. – The lensing shows up statistically as a preferred stretching of the background objects perpendicular to the direction to the center of the lens ...
... • Weak lensing - distortions are much smaller – Detected by analyzing large numbers of objects to find distortions of only a few percent. – The lensing shows up statistically as a preferred stretching of the background objects perpendicular to the direction to the center of the lens ...
The Milky Way
... The only way to explain the rotation curve of our galaxy is to say that there is lots and lots of mass that is not emitting light. The halo of our galaxy must be full of it. The halo outweighs the disk by a factor of 10. As far as we can tell, this mass doesn’t emit any ...
... The only way to explain the rotation curve of our galaxy is to say that there is lots and lots of mass that is not emitting light. The halo of our galaxy must be full of it. The halo outweighs the disk by a factor of 10. As far as we can tell, this mass doesn’t emit any ...
Comments
... evolution of a primordial composition hydrogen-helium plasma without assuming collisional ionization equilibrium. The galaxy formation model is mainly based on the identification of converging dense cold gas regions. ...
... evolution of a primordial composition hydrogen-helium plasma without assuming collisional ionization equilibrium. The galaxy formation model is mainly based on the identification of converging dense cold gas regions. ...
The Static Universe of Walther Nernst
... can be seen as one of the most notable opponents of the hyper-evolutionism that characterizes science in our century. This places him in a prominent position in the history of the struggle for a scientific world picture. The claim of a stationary Universe suggests, at least on the surface, a conflic ...
... can be seen as one of the most notable opponents of the hyper-evolutionism that characterizes science in our century. This places him in a prominent position in the history of the struggle for a scientific world picture. The claim of a stationary Universe suggests, at least on the surface, a conflic ...
34nbody
... Stellar dynamics during the collision of two galaxies. Formation of structure in the universe. Dynamics of galaxies during cluster formation. ...
... Stellar dynamics during the collision of two galaxies. Formation of structure in the universe. Dynamics of galaxies during cluster formation. ...
ilc_brief_physics
... SUSY theories and only detailed measurement of quantum numbers and masses of SUSY particles can show us which one is true. The measured partner-particle masses can be extrapolated to high energy to reveal the theory at work. ...
... SUSY theories and only detailed measurement of quantum numbers and masses of SUSY particles can show us which one is true. The measured partner-particle masses can be extrapolated to high energy to reveal the theory at work. ...
Self-avoiding Random Walks and Olbers` Paradox - Serval
... dominated by attractive gravitational forces that would correspond to the stabilizing interactions along individual segments of the chains. As we know now the interactions between very distant portions of the universe are dominated by repulsive forces that in a way act similarly to the repulsion bet ...
... dominated by attractive gravitational forces that would correspond to the stabilizing interactions along individual segments of the chains. As we know now the interactions between very distant portions of the universe are dominated by repulsive forces that in a way act similarly to the repulsion bet ...
Ch 33) Astrophysics and Cosmology
... Los Angeles, California, then the world’s largest. Hubble demonstrated that these objects were indeed extragalactic because of their great distances. The distance to our nearest large galaxy,‡ Andromeda, is over 2 million light-years, a distance 20 times greater than the diameter of our Galaxy. It s ...
... Los Angeles, California, then the world’s largest. Hubble demonstrated that these objects were indeed extragalactic because of their great distances. The distance to our nearest large galaxy,‡ Andromeda, is over 2 million light-years, a distance 20 times greater than the diameter of our Galaxy. It s ...
On the Electrodynamics of the Big Bang Universe - SLAC
... simply say that at precisely that time the entire Universe changed from fully ionized plasma to become neutral gas in the Universe’s long Dark Ages. Combination Time is much more complex than that (1.2.3). The famous observed cosmic background radiation (CMB), predicted by Gamow, Alpher and Herman a ...
... simply say that at precisely that time the entire Universe changed from fully ionized plasma to become neutral gas in the Universe’s long Dark Ages. Combination Time is much more complex than that (1.2.3). The famous observed cosmic background radiation (CMB), predicted by Gamow, Alpher and Herman a ...
Dark Matter— More Than Meets The Eye
... particles that includes protons and neutrons, which are made of quarks. Most of mass of ordinary matter that we can see and touch of which we are made are baryons. Baryonic matter makes up galaxies, stars, and atoms, has been processed in stars, and has evolved along with the universe. Table 1. Elem ...
... particles that includes protons and neutrons, which are made of quarks. Most of mass of ordinary matter that we can see and touch of which we are made are baryons. Baryonic matter makes up galaxies, stars, and atoms, has been processed in stars, and has evolved along with the universe. Table 1. Elem ...
Dark Matter
... Which of the following statements is incorrect? a) The mass of a galaxy can be measured from its rotation curve. b) More than 90% of the mass of the universe is dark matter c) When Milky Way & Andromeda Galaxy merge, GMC (Giant Molecular Clouds) will collide & lots of new stars will form d) Gal ...
... Which of the following statements is incorrect? a) The mass of a galaxy can be measured from its rotation curve. b) More than 90% of the mass of the universe is dark matter c) When Milky Way & Andromeda Galaxy merge, GMC (Giant Molecular Clouds) will collide & lots of new stars will form d) Gal ...
non-locality, consciousness and the emerging new
... tions, and is, therefore, ultimately intricately interwoven with limits imposed by the process of observation itself (Kafatos 1989, 1996, 1998). Any theoretical model of the universe ultimately horizons of knowledge at some ultimate, faint observational limit. For example, for the big bang theory, ...
... tions, and is, therefore, ultimately intricately interwoven with limits imposed by the process of observation itself (Kafatos 1989, 1996, 1998). Any theoretical model of the universe ultimately horizons of knowledge at some ultimate, faint observational limit. For example, for the big bang theory, ...
The Milky Way Galaxy
... If all the mass there really were only that of visible matter, its gravity would not be enough to retain the hot gas, which would evaporate rapidly. Since the gas is there, there must be more gravity, hence dark matter. ...
... If all the mass there really were only that of visible matter, its gravity would not be enough to retain the hot gas, which would evaporate rapidly. Since the gas is there, there must be more gravity, hence dark matter. ...
Astro 3303 - Cornell Astronomy
... • The sky is dark at night. • Hubble’s Law & the expansion of the Universe (Edwin Hubble: 1927) • If the universe is finite in space and time and is expanding, it must have been smaller in the past. • The Cosmic Microwave Background (CMB) Radiation (Arno Penzias and Robert Wilson: 1965) • Thermal sp ...
... • The sky is dark at night. • Hubble’s Law & the expansion of the Universe (Edwin Hubble: 1927) • If the universe is finite in space and time and is expanding, it must have been smaller in the past. • The Cosmic Microwave Background (CMB) Radiation (Arno Penzias and Robert Wilson: 1965) • Thermal sp ...
Beatrice Muriel Hill Tinsley
... IMF depend on gas composition? How much gas will be turned into stars in a merger and how much thrown out? etc. An important part of the evidence for the importance of mergers came from the long observation of one small part of the sky called the Hubble Deep Field, which was organized by Robert Will ...
... IMF depend on gas composition? How much gas will be turned into stars in a merger and how much thrown out? etc. An important part of the evidence for the importance of mergers came from the long observation of one small part of the sky called the Hubble Deep Field, which was organized by Robert Will ...
Cosmology with GMRT
... – Apply to a single object (optical results are averages over large redshift range) – Not subject to the same systematics – Currently probe a complementary redshift range ...
... – Apply to a single object (optical results are averages over large redshift range) – Not subject to the same systematics – Currently probe a complementary redshift range ...
Solutions to Homework #6, AST 203, Spring 2012
... velocity is then v/c = 1/ 2 ≈ 0.7, or v = 0.7c. 4 points off for missing the Lorentz length contraction factor. 2 more points off for then getting the relative velocity of c and not commenting it does not make sense. 2. A Hitchhiker’s Challenge (30 points) “A full set of rules [of Brockian Ultra Cri ...
... velocity is then v/c = 1/ 2 ≈ 0.7, or v = 0.7c. 4 points off for missing the Lorentz length contraction factor. 2 more points off for then getting the relative velocity of c and not commenting it does not make sense. 2. A Hitchhiker’s Challenge (30 points) “A full set of rules [of Brockian Ultra Cri ...
Mach`s Principle and the Concept of Mass
... Abstract. Mach’s Principle is shown to originate in the electromagnetic force involving vibrating neutral electric dipoles. From the universal electrodynamic force derivation of the forces of inertia and gravity, mass is not a fundamental entity. What was called mass in the past represents a groupin ...
... Abstract. Mach’s Principle is shown to originate in the electromagnetic force involving vibrating neutral electric dipoles. From the universal electrodynamic force derivation of the forces of inertia and gravity, mass is not a fundamental entity. What was called mass in the past represents a groupin ...
Cosmic Connection to the elements
... (i.e. protons and/or neutrons). Again, they go from a less stable to a more stable nuclear structure. This is illustrated in greater detail by the “Binding Energy Per Nucleon” chart (Figure 4). The number of nucleons in the nucleus, plotted along the x-axis, is equivalent to the atomic weight of the ...
... (i.e. protons and/or neutrons). Again, they go from a less stable to a more stable nuclear structure. This is illustrated in greater detail by the “Binding Energy Per Nucleon” chart (Figure 4). The number of nucleons in the nucleus, plotted along the x-axis, is equivalent to the atomic weight of the ...
ppt
... away • This single number describes the rate of the cosmic expansion, relating the apparent recession velocities of external galaxies to their distance • The more distant objects are receding more rapidly than closer ones seems to imply expansion of the universe, and is the main observation which le ...
... away • This single number describes the rate of the cosmic expansion, relating the apparent recession velocities of external galaxies to their distance • The more distant objects are receding more rapidly than closer ones seems to imply expansion of the universe, and is the main observation which le ...
The Hubble Ultra Deep Field Project Overview
... at optical wavelengths, the emission you observe may have been emitted at much shorter (blue Visible or even UV) wavelengths. -Irregulars: Some galaxies can not be classified neatly as Spiral or Elliptical (or some variation thereof). These galaxies are then lumped into a catch-all morphological cla ...
... at optical wavelengths, the emission you observe may have been emitted at much shorter (blue Visible or even UV) wavelengths. -Irregulars: Some galaxies can not be classified neatly as Spiral or Elliptical (or some variation thereof). These galaxies are then lumped into a catch-all morphological cla ...
AST 207 Final Exam 14 December 2009
... a. (2 pts.) At the present time, how does the sun produce energy? What is used up and what is created? b. (1 pt.) What is the approximate age of the sun and earth? c. (1 pts.) What will the sun become when it completely exhausts its fuel? (1 pt.) How big will it be? (1 pt.) What will prevent gravity ...
... a. (2 pts.) At the present time, how does the sun produce energy? What is used up and what is created? b. (1 pt.) What is the approximate age of the sun and earth? c. (1 pts.) What will the sun become when it completely exhausts its fuel? (1 pt.) How big will it be? (1 pt.) What will prevent gravity ...
B Non-Conservation, Cold Dark Matter and Subpreon Model § 1
... Why does Nature choose an integer ZI2 at the pre on level? It seems almost impossible to answer this quention, if we stop at the preon model. These facts show the incompleteness of the pre on level physics. We attempt to solve these problems by stepping into a subpreon level and making fundamental m ...
... Why does Nature choose an integer ZI2 at the pre on level? It seems almost impossible to answer this quention, if we stop at the preon model. These facts show the incompleteness of the pre on level physics. We attempt to solve these problems by stepping into a subpreon level and making fundamental m ...
Big Bang
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution. The model accounts for the fact that the universe expanded from a very high density and high temperature state, and offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background, large scale structure, and Hubble's Law. If the known laws of physics are extrapolated beyond where they are valid, there is a singularity. Modern measurements place this moment at approximately 13.8 billion years ago, which is thus considered the age of the universe. After the initial expansion, the universe cooled sufficiently to allow the formation of subatomic particles, and later simple atoms. Giant clouds of these primordial elements later coalesced through gravity to form stars and galaxies.Since Georges Lemaître first noted, in 1927, that an expanding universe might be traced back in time to an originating single point, scientists have built on his idea of cosmic expansion. While the scientific community was once divided between supporters of two different expanding universe theories, the Big Bang and the Steady State theory, accumulated empirical evidence provides strong support for the former. In 1929, from analysis of galactic redshifts, Edwin Hubble concluded that galaxies are drifting apart, important observational evidence consistent with the hypothesis of an expanding universe. In 1965, the cosmic microwave background radiation was discovered, which was crucial evidence in favor of the Big Bang model, since that theory predicted the existence of background radiation throughout the universe before it was discovered. More recently, measurements of the redshifts of supernovae indicate that the expansion of the universe is accelerating, an observation attributed to dark energy's existence. The known physical laws of nature can be used to calculate the characteristics of the universe in detail back in time to an initial state of extreme density and temperature.