Document
... • According to “lookback time”, populations of ancient galaxies are seen when the Universe was very young, which makes no sense. ...
... • According to “lookback time”, populations of ancient galaxies are seen when the Universe was very young, which makes no sense. ...
The Attractive Universe Theory
... attraction of two masses will depend on the fact how the straight line connecting these masses is oriented with respect to the system of fixed stars. Thus the observation of gravitation anisotropy could open up a new astronomical method. ...
... attraction of two masses will depend on the fact how the straight line connecting these masses is oriented with respect to the system of fixed stars. Thus the observation of gravitation anisotropy could open up a new astronomical method. ...
Misconceptions in Cosmology and how to correct them
... The editor of ‘Scientific American’ has realised something is badly wrong in physics and has organised a competition asking for entries to show what is wrong. (See FQXi after references.) It may seem strange for an engineer to be pointing out false aspects of Cosmology but the reason is simple. Ther ...
... The editor of ‘Scientific American’ has realised something is badly wrong in physics and has organised a competition asking for entries to show what is wrong. (See FQXi after references.) It may seem strange for an engineer to be pointing out false aspects of Cosmology but the reason is simple. Ther ...
relativistic time correction on movement of distant galaxies
... distance of 13.4 billion light years from Earth. That means, light that we have just received is giving information about 13.4 billion years old. This galaxy is reported to be containing stars. Suppose there is a Sun like star of about 5 billion years old, then that star was formed at about 13.4+5=1 ...
... distance of 13.4 billion light years from Earth. That means, light that we have just received is giving information about 13.4 billion years old. This galaxy is reported to be containing stars. Suppose there is a Sun like star of about 5 billion years old, then that star was formed at about 13.4+5=1 ...
Tsinghua Center for Astrophysics and the Dark - CPPM
... Multiprobe measurements (SNIa, BAO, Clusters, Weak Lensing, …) for cosmology and ancillary science ...
... Multiprobe measurements (SNIa, BAO, Clusters, Weak Lensing, …) for cosmology and ancillary science ...
2020 Vision: An Overview of New Worlds, New Horizons in
... The observed acceleration is consistent with the idea that empty space is permeated with some gravitationally repulsive dark energy, a mysterious substance that accounts for more than 70 percent of the energy content of the universe. Alternatively, cosmic acceleration might indicate that Einstein’s ...
... The observed acceleration is consistent with the idea that empty space is permeated with some gravitationally repulsive dark energy, a mysterious substance that accounts for more than 70 percent of the energy content of the universe. Alternatively, cosmic acceleration might indicate that Einstein’s ...
(NATS) 1585 3 - York University – Faculty of Science
... the universe beyond our solar system is like and how it works and will use the universe to teach students about logic and scientific reasoning. We will share colour photos and detailed computer simulations of intriguing phenomena (such as black holes, interacting galaxies, and gravitational lenses) ...
... the universe beyond our solar system is like and how it works and will use the universe to teach students about logic and scientific reasoning. We will share colour photos and detailed computer simulations of intriguing phenomena (such as black holes, interacting galaxies, and gravitational lenses) ...
Limits of time in cosmology
... Whereas cosmologists often refer to clocks as sketched above, they also define cosmic time ‘implicitly’ by the specific cosmological model employed to describe the universe.4 This can be done e.g. through the relation between time and the scale factor. If we for instance consider a radiation dominat ...
... Whereas cosmologists often refer to clocks as sketched above, they also define cosmic time ‘implicitly’ by the specific cosmological model employed to describe the universe.4 This can be done e.g. through the relation between time and the scale factor. If we for instance consider a radiation dominat ...
After School Guide to Ology Astronomy
... and which occurred at some time between 13 and 14 billion years ago. According to current theory, the Big Bang launched the ongoing expansion of the universe. black hole – A region in space where gravity is so strong that space closes back on itself, allowing nothing, not even light, to escape. come ...
... and which occurred at some time between 13 and 14 billion years ago. According to current theory, the Big Bang launched the ongoing expansion of the universe. black hole – A region in space where gravity is so strong that space closes back on itself, allowing nothing, not even light, to escape. come ...
A Journey... Back To The Beginning of Time!
... a. What are they and how are they formed? b. What significance does this have on the universe? 3. Stellar evolution: a. How are stars created? b. What is the life cycle of a star? c. What are the determining factors that causes a star to die? 4. Galaxies: a. What has happened/is happening to our gal ...
... a. What are they and how are they formed? b. What significance does this have on the universe? 3. Stellar evolution: a. How are stars created? b. What is the life cycle of a star? c. What are the determining factors that causes a star to die? 4. Galaxies: a. What has happened/is happening to our gal ...
The Science of the Extraterrestrials
... explain the world. Explaining comes back to describing a relationship between two situations. But can it be that a relationship may structurally escape us? Take the Big Bang. The universe is in accelerated expansion, we are told. So be it. But if it really is expanding, why do we study the microscop ...
... explain the world. Explaining comes back to describing a relationship between two situations. But can it be that a relationship may structurally escape us? Take the Big Bang. The universe is in accelerated expansion, we are told. So be it. But if it really is expanding, why do we study the microscop ...
The Big Bang Is Bunk - 21stcenturysciencetech.com
... Material would immediately begin expanding into it. The only way this process could be stopped would be for every thing to have zero kinetic energy at absolute zero. Clearly, this is not reality; however, the assumption was made. Again, rational people do not make ridiculous assumptions; there must ...
... Material would immediately begin expanding into it. The only way this process could be stopped would be for every thing to have zero kinetic energy at absolute zero. Clearly, this is not reality; however, the assumption was made. Again, rational people do not make ridiculous assumptions; there must ...
Self-avoiding Random Walks and Olbers` Paradox - Serval
... Paradox: the sky would shine like the surface of the sun! Apparently, this is not the case we are interested in. In the following, we will concentrate on the case in which the stars follow the distance distribution of a self-avoiding random walk (of infinite length). Let W be a self-avoiding random w ...
... Paradox: the sky would shine like the surface of the sun! Apparently, this is not the case we are interested in. In the following, we will concentrate on the case in which the stars follow the distance distribution of a self-avoiding random walk (of infinite length). Let W be a self-avoiding random w ...
The Dance of the Fertile Universe
... born and age go through an evolutionary process. Galaxies are participating in the expansion of the universe. When we look at them on a large scale we see that they are not distributed homogeneously. There are large empty spaces and many dense alignments. Let us now review what we know of the histor ...
... born and age go through an evolutionary process. Galaxies are participating in the expansion of the universe. When we look at them on a large scale we see that they are not distributed homogeneously. There are large empty spaces and many dense alignments. Let us now review what we know of the histor ...
Frontiers of Physics - Wright State University
... the distance in light years. For example, the Andromeda galaxy is 2 million light years away, so that the light now reaching us left it 2 million years ago. If we could be there now, Andromeda would be different. Similarly, light from the most distant galaxy left it 14 billion years ago. We have an ...
... the distance in light years. For example, the Andromeda galaxy is 2 million light years away, so that the light now reaching us left it 2 million years ago. If we could be there now, Andromeda would be different. Similarly, light from the most distant galaxy left it 14 billion years ago. We have an ...
Chapter 34 - mrphysicsportal.net
... the distance in light years. For example, the Andromeda galaxy is 2 million light years away, so that the light now reaching us left it 2 million years ago. If we could be there now, Andromeda would be different. Similarly, light from the most distant galaxy left it 14 billion years ago. We have an ...
... the distance in light years. For example, the Andromeda galaxy is 2 million light years away, so that the light now reaching us left it 2 million years ago. If we could be there now, Andromeda would be different. Similarly, light from the most distant galaxy left it 14 billion years ago. We have an ...
here
... A. Radiation dominated over matter at very early times in the Universe’s history, but matter has dominated over radiation ever since the Universe’s 300,000th birthday B. Most of the elements in the periodic table that we learn about in school/college today were synthesized in the early Universe and ...
... A. Radiation dominated over matter at very early times in the Universe’s history, but matter has dominated over radiation ever since the Universe’s 300,000th birthday B. Most of the elements in the periodic table that we learn about in school/college today were synthesized in the early Universe and ...
here
... A. Radiation dominated over matter at very early times in the Universe’s history, but matter has dominated over radiation ever since the Universe’s 300,000th birthday B. Most of the elements in the periodic table that we learn about in school/college today were synthesized in the early Universe and ...
... A. Radiation dominated over matter at very early times in the Universe’s history, but matter has dominated over radiation ever since the Universe’s 300,000th birthday B. Most of the elements in the periodic table that we learn about in school/college today were synthesized in the early Universe and ...
Article 8
... expanding now, so in the past it must have been smaller. If it were smaller in the past, then there probably was a time when it was infinitesimally small. One could ask why don't we think that it might be expanding now but it could have been shrinking before and we just don't know about it. The answ ...
... expanding now, so in the past it must have been smaller. If it were smaller in the past, then there probably was a time when it was infinitesimally small. One could ask why don't we think that it might be expanding now but it could have been shrinking before and we just don't know about it. The answ ...
Observational Evidence for Dark Matter Simona Murgia, SLAC-KIPAC XXXIX SLAC Summer Institute
... Proposed to explain rotation curves of galaxies (Milgrom, 1983). Does a very good job! No dark matter necessary. Parameter a0 (1.2 x 10-10ms-2, determined by observations): ...
... Proposed to explain rotation curves of galaxies (Milgrom, 1983). Does a very good job! No dark matter necessary. Parameter a0 (1.2 x 10-10ms-2, determined by observations): ...
slides
... At the beginning, size of the universe was extremely small, smaller than a single atom, filled with energy, extremely hot (over 1032K) and dense. ...
... At the beginning, size of the universe was extremely small, smaller than a single atom, filled with energy, extremely hot (over 1032K) and dense. ...
Chapter 31
... within the dotted box would not contain 3 galaxies after a time. The steady-state theory requires new matter to be added so that the area within the dotted box always contains 3 galaxies. ...
... within the dotted box would not contain 3 galaxies after a time. The steady-state theory requires new matter to be added so that the area within the dotted box always contains 3 galaxies. ...
An Ancient Universe
... human history is a mere blink of an eye in comparison. We also provide some references to classroom activities, and resources for further exploration of some the astronomical ideas we discuss. As part of our discussion, we want to emphasize the methods by which scientists study cosmic age and evolut ...
... human history is a mere blink of an eye in comparison. We also provide some references to classroom activities, and resources for further exploration of some the astronomical ideas we discuss. As part of our discussion, we want to emphasize the methods by which scientists study cosmic age and evolut ...
Chapter 1 - Chabot College
... studying astronomy on planets in Andromeda. Could they know that we exist here on Earth? A. Yes, because we can see stars in Andromeda, so they can see us in the Milky Way. B. No, the light from the solar system has not yet reached Andromeda. C. No, the light from the solar system that has reached A ...
... studying astronomy on planets in Andromeda. Could they know that we exist here on Earth? A. Yes, because we can see stars in Andromeda, so they can see us in the Milky Way. B. No, the light from the solar system has not yet reached Andromeda. C. No, the light from the solar system that has reached A ...
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.