1 Dark Matter as a consequence of electric charge non
... with the gravitational field to be described below neutral particles survived inflation. These “early” neutral particles constitute what appears at present dark matter. For the sake of concreteness (cf. below) we will assume that these particles are thermal relics. Ordinary matter was produced after ...
... with the gravitational field to be described below neutral particles survived inflation. These “early” neutral particles constitute what appears at present dark matter. For the sake of concreteness (cf. below) we will assume that these particles are thermal relics. Ordinary matter was produced after ...
Cosmic Dawn A Hunting for the First Stars in the Universe
... of these secondary elements backwards in time, we can infer the existence of generations of stars that have long since disappeared, in much the same way that an archeologist peels back geological strata to map the fossil record of extinct species. What astronomers call the “pollution” of the univer ...
... of these secondary elements backwards in time, we can infer the existence of generations of stars that have long since disappeared, in much the same way that an archeologist peels back geological strata to map the fossil record of extinct species. What astronomers call the “pollution” of the univer ...
How Telescopes Changed our Universe
... In our own solar system, telescopes found planets our eyes could not see. Are there other planets outside of our solar system? ...
... In our own solar system, telescopes found planets our eyes could not see. Are there other planets outside of our solar system? ...
Okada
... The success of the Standard Big-Bang Cosmology Hubble expansion Hubble’s law: expansion of the Universe ...
... The success of the Standard Big-Bang Cosmology Hubble expansion Hubble’s law: expansion of the Universe ...
Formation of the Solar System
... also incorporates interstellar dust as an essential ingredient in the formation of the planets. This theory claims that the dust grains of the interstellar medium helped cool the nebular cloud by radiating heat away, and also acted as a foundation upon which atoms could attach. These properties of t ...
... also incorporates interstellar dust as an essential ingredient in the formation of the planets. This theory claims that the dust grains of the interstellar medium helped cool the nebular cloud by radiating heat away, and also acted as a foundation upon which atoms could attach. These properties of t ...
Huang.ppt
... of the same order of either Planck scale or eV. examples, V(f) = V0 exp(-lf) V(f) = V0 + V1 f V(f) = V0 fn (n=0,±1, ±2, ±3,…) ...
... of the same order of either Planck scale or eV. examples, V(f) = V0 exp(-lf) V(f) = V0 + V1 f V(f) = V0 fn (n=0,±1, ±2, ±3,…) ...
EPSVienna_binetruy
... The cosmological dynamics may help us to find clues for some of the most fundamental problems that we face and maybe pave the way for a reconciliation of gravity (described by general relativity) with the quantum theory (Standard Model). ...
... The cosmological dynamics may help us to find clues for some of the most fundamental problems that we face and maybe pave the way for a reconciliation of gravity (described by general relativity) with the quantum theory (Standard Model). ...
Recent versions of the Design Argument
... Argument from Probability Key Points of Swinburne’s argument continued…: • The universe could just as easily have been chaotic. The fact that it is not suggests that it was designed for the purpose of human life to develop – it did not just occur by random chance. – An intelligently designed univer ...
... Argument from Probability Key Points of Swinburne’s argument continued…: • The universe could just as easily have been chaotic. The fact that it is not suggests that it was designed for the purpose of human life to develop – it did not just occur by random chance. – An intelligently designed univer ...
HST Observations of the
... knowing how bright they appeared and relating them to other Cepheid stars which were used as standard candles, we can estimate the distance to the galaxies. calculated estimates have the nearest galaxies within the HDF approximately ...
... knowing how bright they appeared and relating them to other Cepheid stars which were used as standard candles, we can estimate the distance to the galaxies. calculated estimates have the nearest galaxies within the HDF approximately ...
fundamental_reality\holographic principle
... theorists don’t even want to think about it…. We all expect that electrons, photons, and other elementary particles are at least as big as the Plank length, and possibly bigger. The problem is that the mathematics of string theory implies an absurdly violent case of quantum jitters [zero point fluct ...
... theorists don’t even want to think about it…. We all expect that electrons, photons, and other elementary particles are at least as big as the Plank length, and possibly bigger. The problem is that the mathematics of string theory implies an absurdly violent case of quantum jitters [zero point fluct ...
News Release - האוניברסיטה העברית
... some ten billion years ago (about three billion years after the Big Bang which first established the Universe). “The large galaxies, as they appear in this early stage, indeed created stars at a very rapid rate, but this does not appear to be at all a result of galactic mergers,” says Prof. Dekel. T ...
... some ten billion years ago (about three billion years after the Big Bang which first established the Universe). “The large galaxies, as they appear in this early stage, indeed created stars at a very rapid rate, but this does not appear to be at all a result of galactic mergers,” says Prof. Dekel. T ...
Exploring the Helium Reionization Era
... cooled to the point where the electrons could combine with protons to form atoms of hydrogen and other light elements. Following this transition, called Recombination, photons were not as scattered and the universe became transparent. Ironically, the period immediately after Recombination is referre ...
... cooled to the point where the electrons could combine with protons to form atoms of hydrogen and other light elements. Following this transition, called Recombination, photons were not as scattered and the universe became transparent. Ironically, the period immediately after Recombination is referre ...
Description
... Course Description SCI109 -- The Cosmos is an introductory cosmology and astronomy course for all science and non-science majors. The course introduces basic principles and laws in physics and astronomy, scientific methods and instruments used in the exploration of the origin and structure of our u ...
... Course Description SCI109 -- The Cosmos is an introductory cosmology and astronomy course for all science and non-science majors. The course introduces basic principles and laws in physics and astronomy, scientific methods and instruments used in the exploration of the origin and structure of our u ...
URL - StealthSkater
... If time machines are possible, it is likely that someone in the Future will already have constructed one. After all, in the Future there is time to complete even the largest engineering project! Even if humans are not up to the task, creatures from other planets may try. So why are we not overrun by ...
... If time machines are possible, it is likely that someone in the Future will already have constructed one. After all, in the Future there is time to complete even the largest engineering project! Even if humans are not up to the task, creatures from other planets may try. So why are we not overrun by ...
Expanding Universe Lab
... the result of Doppler shifts, the conclusion is that these galaxies were all moving away from us. In the 1920s, Edwin Hubble of the Mt. Wilson Observatory measured distances to many galaxies using Cepheid variables and compared these distances to the velocity with which the galaxies were moving away ...
... the result of Doppler shifts, the conclusion is that these galaxies were all moving away from us. In the 1920s, Edwin Hubble of the Mt. Wilson Observatory measured distances to many galaxies using Cepheid variables and compared these distances to the velocity with which the galaxies were moving away ...
Ch 1 Jan 17
... • A light-year is the distance light can travel in 1 year. It is not a measure of time. It is used to measure the distance to stars and galaxies. • It is about 10 trillion kilometers (6 trillion miles). • In the solar system, the AU (astronomical unit) is used. 1 AU is the average distance between t ...
... • A light-year is the distance light can travel in 1 year. It is not a measure of time. It is used to measure the distance to stars and galaxies. • It is about 10 trillion kilometers (6 trillion miles). • In the solar system, the AU (astronomical unit) is used. 1 AU is the average distance between t ...
here
... which the fuel is spent. A star has a total fuel reservoir of M . On the main sequence, most stars obey the relation L ∝ M 4 . Thus, the main sequence lifetime is tMS ∼ M c2 /L ∼ M/M 4 ∼ 1/M 3 . 5: 0.1 and 100 M⊙ . The minimum mass is set by the mass at which it is possible to have H fusion. For M < ...
... which the fuel is spent. A star has a total fuel reservoir of M . On the main sequence, most stars obey the relation L ∝ M 4 . Thus, the main sequence lifetime is tMS ∼ M c2 /L ∼ M/M 4 ∼ 1/M 3 . 5: 0.1 and 100 M⊙ . The minimum mass is set by the mass at which it is possible to have H fusion. For M < ...
Chapter 1: A Modern View of the Universe
... A sun that is the source of all our power. The sun and you and me and all the stars that we can see Are moving at a million miles a day In an outer spiral arm, at forty thousand miles an hour, Of the galaxy we call the 'Milky Way'. Our galaxy itself contains a hundred billion stars. It's a hundred t ...
... A sun that is the source of all our power. The sun and you and me and all the stars that we can see Are moving at a million miles a day In an outer spiral arm, at forty thousand miles an hour, Of the galaxy we call the 'Milky Way'. Our galaxy itself contains a hundred billion stars. It's a hundred t ...
What is Dark Matter?
... unaccounted for in the universe and if they add up it could suggest that the density of the universe is greater than the critical density, making it positively curved, and hence predicts the Big Crunch, where the universe collapses under its own gravitational force.[5] ...
... unaccounted for in the universe and if they add up it could suggest that the density of the universe is greater than the critical density, making it positively curved, and hence predicts the Big Crunch, where the universe collapses under its own gravitational force.[5] ...
HAVE YOU EVER GONE - Apologetics Press
... problem is even bigger. Now they are forced to say that the tiny ball of stuff caused a Universe 93 billion light years across. That is impossible. It violates the scientific Law of Cause and Effect, since the cause must be greater than the effect. So, what could cause a huge Universe the size of ou ...
... problem is even bigger. Now they are forced to say that the tiny ball of stuff caused a Universe 93 billion light years across. That is impossible. It violates the scientific Law of Cause and Effect, since the cause must be greater than the effect. So, what could cause a huge Universe the size of ou ...
Fall 2009 Qualifying Exam
... A rod of length L lying in the xy-plane pivots with constant angular velocity counterclockwise about the origin. A constant magnetic field of magnitude B0 is oriented in the z-direction. (a) Find the motional emf in the rod. (b) At what end of the rod will the negative charge concentrate? ...
... A rod of length L lying in the xy-plane pivots with constant angular velocity counterclockwise about the origin. A constant magnetic field of magnitude B0 is oriented in the z-direction. (a) Find the motional emf in the rod. (b) At what end of the rod will the negative charge concentrate? ...
Was Aristotle Correct that the Earth is the “Heaviest” Object in the
... Obviously, the universe is much easier to move than the Earth. In fact, since the Earth’s effective mass is so exorbitantly greater than the universe, it would be absolutely impossible to move the Earth out of its place, which coincides with the geocentrist’ ...
... Obviously, the universe is much easier to move than the Earth. In fact, since the Earth’s effective mass is so exorbitantly greater than the universe, it would be absolutely impossible to move the Earth out of its place, which coincides with the geocentrist’ ...
Talk - Otterbein University
... • There are different types of EM radiation, visible light is just one of them • EM waves can travel in vacuum, no medium needed • The speed of EM radiation “c” is the same for all types and very high ( light travels to the moon in 1 ...
... • There are different types of EM radiation, visible light is just one of them • EM waves can travel in vacuum, no medium needed • The speed of EM radiation “c” is the same for all types and very high ( light travels to the moon in 1 ...
Big Bang Theory notes
... As you watch the following video clip, discover the answers to the following questions & write them in your notepacket. 1. What is the name of the enormous cloud of gas & dust within space that formed the solar system? 2. What 2 forces give the sun its spherical shape? 3. What is the main form of ra ...
... As you watch the following video clip, discover the answers to the following questions & write them in your notepacket. 1. What is the name of the enormous cloud of gas & dust within space that formed the solar system? 2. What 2 forces give the sun its spherical shape? 3. What is the main form of ra ...
Flatness problem
The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Such problems arise from the observation that some of the initial conditions of the universe appear to be fine-tuned to very 'special' values, and that a small deviation from these values would have had massive effects on the nature of the universe at the current time.In the case of the flatness problem, the parameter which appears fine-tuned is the density of matter and energy in the universe. This value affects the curvature of space-time, with a very specific critical value being required for a flat universe. The current density of the universe is observed to be very close to this critical value. Since the total density departs rapidly from the critical value over cosmic time, the early universe must have had a density even closer to the critical density, departing from it by one part in 1062 or less. This leads cosmologists to question how the initial density came to be so closely fine-tuned to this 'special' value.The problem was first mentioned by Robert Dicke in 1969. The most commonly accepted solution among cosmologists is cosmic inflation, the idea that the universe went through a brief period of extremely rapid expansion in the first fraction of a second after the Big Bang; along with the monopole problem and the horizon problem, the flatness problem is one of the three primary motivations for inflationary theory.