TIME ASYMMETRY IN ELECTRODYNAMICS AND COSMOLOGY
... dispersion. If we Fourier analyse the outgoing wave from the source, the different components travel at different velocities through the intergalactic medium. The intergalactic density and other parameters are such that large phase differences are built up between neighbouring frequencies, with the ...
... dispersion. If we Fourier analyse the outgoing wave from the source, the different components travel at different velocities through the intergalactic medium. The intergalactic density and other parameters are such that large phase differences are built up between neighbouring frequencies, with the ...
OCR Physics A Refer to the Physics A datasheet for data, formulae
... A prominent absorption line due to hydrogen is observed in the spectrum from the binary system. The wavelength of this line measured from a laboratory source is 656.28 nm. Calculate the maximum and minimum values for the wavelength of this line due to the stars’ orbital motion. ...
... A prominent absorption line due to hydrogen is observed in the spectrum from the binary system. The wavelength of this line measured from a laboratory source is 656.28 nm. Calculate the maximum and minimum values for the wavelength of this line due to the stars’ orbital motion. ...
ppt
... Weakly Interacting Massive Particles. Generic name for any particle that has a lot of mass, but interacts weakly with normal matter. Must be massive, to give required mass. Must be weakly interacting, in order to have avoided detection (i.e. cannot absorb or emit E/M radiation). ...
... Weakly Interacting Massive Particles. Generic name for any particle that has a lot of mass, but interacts weakly with normal matter. Must be massive, to give required mass. Must be weakly interacting, in order to have avoided detection (i.e. cannot absorb or emit E/M radiation). ...
the universe
... Scientists have gathered a lot of evidence and information about the universe. They have used their observations to develop a theory called the Big Bang. The theory states that about 13,700 million years ago all the matter in the universe was concentrated into a single incredibly tiny point. This be ...
... Scientists have gathered a lot of evidence and information about the universe. They have used their observations to develop a theory called the Big Bang. The theory states that about 13,700 million years ago all the matter in the universe was concentrated into a single incredibly tiny point. This be ...
the universe
... Scientists have gathered a lot of evidence and information about the universe. They have used their observations to develop a theory called the Big Bang. The theory states that about 13,700 million years ago all the matter in the universe was concentrated into a single incredibly tiny point. This be ...
... Scientists have gathered a lot of evidence and information about the universe. They have used their observations to develop a theory called the Big Bang. The theory states that about 13,700 million years ago all the matter in the universe was concentrated into a single incredibly tiny point. This be ...
Chapter 31 - The Galaxy & Universe
... 1. The Universe does not change with time. 2. The Universe had no beginning 3. The Density stays constant 4. As Universe expands, new material is created and added ...
... 1. The Universe does not change with time. 2. The Universe had no beginning 3. The Density stays constant 4. As Universe expands, new material is created and added ...
Eddington`s Theory of Gravity and Its Progeny
... deviation from conventional cosmology occurs at the Planck time on a time scale of that order. A far more interesting, in our view, behavior can be found if > 0 where one can show that H 2 ða aB Þ2 , which means that lnða=aB 1Þ / t tB . In this case there is no bounce; if we wind back the ...
... deviation from conventional cosmology occurs at the Planck time on a time scale of that order. A far more interesting, in our view, behavior can be found if > 0 where one can show that H 2 ða aB Þ2 , which means that lnða=aB 1Þ / t tB . In this case there is no bounce; if we wind back the ...
The Solar System - Astronomy - The University of Texas at Austin
... – We cannot possibily see anything older, or further, than 14 billion years. – However, the actual size of the entire Universe is not limited to the size of the horizon --- it can be much larger, but we cannot determine it by any observational means, because nothing travels faster than light. ...
... – We cannot possibily see anything older, or further, than 14 billion years. – However, the actual size of the entire Universe is not limited to the size of the horizon --- it can be much larger, but we cannot determine it by any observational means, because nothing travels faster than light. ...
1 Introduction for non-astronomers 1.1 Our expanding universe
... which was trying to pull it back together. The gravity of normal “baryonic” matter (which includes stars, dust, and everything else that we can see around us) was being helped in this task by an additional component of invisible “dark matter”. Although dark matter seems to have the same gravitationa ...
... which was trying to pull it back together. The gravity of normal “baryonic” matter (which includes stars, dust, and everything else that we can see around us) was being helped in this task by an additional component of invisible “dark matter”. Although dark matter seems to have the same gravitationa ...
AV_Paper1_TheAgeOfTheUniverse
... universe. This being the case, they reveal a great deal about the early universe plus the origin of galaxies and large scale structure in the universe. (NASA 3). By detecting polarized protons, WMAP was able to reveal the ionization history of the universe. Since ionized gas can interact with CMB ph ...
... universe. This being the case, they reveal a great deal about the early universe plus the origin of galaxies and large scale structure in the universe. (NASA 3). By detecting polarized protons, WMAP was able to reveal the ionization history of the universe. Since ionized gas can interact with CMB ph ...
Lesson 4d Models of the Solar System
... Venus has phases (like the moon) and appears to change size Jupiter has objects orbiting it (moons) There are dark spots on the sun The sun rotates and the spots on the ...
... Venus has phases (like the moon) and appears to change size Jupiter has objects orbiting it (moons) There are dark spots on the sun The sun rotates and the spots on the ...
Scale of the Cosmos ppt.
... The Universe- the largest SYSTEM What is the Universe? How large is the universe? How many galaxies are in the universe? ...
... The Universe- the largest SYSTEM What is the Universe? How large is the universe? How many galaxies are in the universe? ...
Document
... • Gravity can’t do this. • This repulsive force has been named “Dark Energy” • It fits into Einstein’s equations just like his old cosmological constant. But this isn’t keeping the universe static. It is forcing it to grow more rapidly. ...
... • Gravity can’t do this. • This repulsive force has been named “Dark Energy” • It fits into Einstein’s equations just like his old cosmological constant. But this isn’t keeping the universe static. It is forcing it to grow more rapidly. ...
Multiple choice test questions 2, Winter Semester
... C) They evaporated. D) They combined in groups to make electrons and neutrinos. 24) Why do we expect the cosmic background radiation to be almost, but not quite, the same in all directions? A) The overall structure of the universe is very uniform, but the universe must have contained some regions of ...
... C) They evaporated. D) They combined in groups to make electrons and neutrinos. 24) Why do we expect the cosmic background radiation to be almost, but not quite, the same in all directions? A) The overall structure of the universe is very uniform, but the universe must have contained some regions of ...
Training
... Freedman of the Observatories of the Carnegie Institution of Washington, observed this galaxy on 13 different occasions over the course of two months. Images were obtained with Hubble's Wide Field Planetary Camera 2 (WFPC2) through three different color filters. Based on their discovery and careful ...
... Freedman of the Observatories of the Carnegie Institution of Washington, observed this galaxy on 13 different occasions over the course of two months. Images were obtained with Hubble's Wide Field Planetary Camera 2 (WFPC2) through three different color filters. Based on their discovery and careful ...
Nov 2009
... the universe. Earth is at the centre of the region. The dark line represents a very thin spherical shell of space distance R from Earth. ...
... the universe. Earth is at the centre of the region. The dark line represents a very thin spherical shell of space distance R from Earth. ...
TCE Syllabus Summary Blank
... identify data sources, and gather, process and analyse information to assess one of the models of the Universe developed from the time of Aristotle to the time of Newton to identify limitations placed on the development of the model by the technology available at the time ...
... identify data sources, and gather, process and analyse information to assess one of the models of the Universe developed from the time of Aristotle to the time of Newton to identify limitations placed on the development of the model by the technology available at the time ...
TR-16
... Supernovae data suggested that the expansion of the universe is speeding up. This acceleration requires that dark energy is 75% of the mass-energy in the universe. Many theorists think that dark energy can be explained with Einstein’s cosmological constant. Dark energy seems to have become effective ...
... Supernovae data suggested that the expansion of the universe is speeding up. This acceleration requires that dark energy is 75% of the mass-energy in the universe. Many theorists think that dark energy can be explained with Einstein’s cosmological constant. Dark energy seems to have become effective ...
Slide 1
... Quasars were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies. ...
... Quasars were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies. ...
doc - IAC
... We want to see how star formation began in the Universe and how the small galaxies that formed in this epoch merged with others to form bigger galaxies. We are interested in investigating the Universe to its limits, in knowing what the first stars were like, how they later influenced their surround ...
... We want to see how star formation began in the Universe and how the small galaxies that formed in this epoch merged with others to form bigger galaxies. We are interested in investigating the Universe to its limits, in knowing what the first stars were like, how they later influenced their surround ...
Evidence of the Big Bang and Structure of the Universe
... A) Galaxy B is moving away from Earth, but galaxies A and C are moving toward Earth. B) Galaxy A is moving away from Earth, but galaxies B and C are moving toward Earth. C) Galaxies A, B, and C are all moving away from Earth. D) Galaxies A, B, and C are all moving toward Earth. ...
... A) Galaxy B is moving away from Earth, but galaxies A and C are moving toward Earth. B) Galaxy A is moving away from Earth, but galaxies B and C are moving toward Earth. C) Galaxies A, B, and C are all moving away from Earth. D) Galaxies A, B, and C are all moving toward Earth. ...
Non-standard cosmology
A non-standard cosmology is any physical cosmological model of the universe that has been, or still is, proposed as an alternative to the Big Bang model of standard physical cosmology. In the history of cosmology, various scientists and researchers have disputed parts or all of the Big Bang due to a rejection or addition of fundamental assumptions needed to develop a theoretical model of the universe. From the 1940s to the 1960s, the astrophysical community was equally divided between supporters of the Big Bang theory and supporters of a rival steady state universe. It was not until advances in observational cosmology in the late 1960s that the Big Bang would eventually become the dominant theory, and today there are few active researchers who dispute it.The term non-standard is applied to any cosmological theory that does not conform to the scientific consensus, but is not used in describing alternative models where no consensus has been reached, and is also used to describe theories that accept a ""big bang"" occurred but differ as to the detailed physics of the origin and evolution of the universe. Because the term depends on the prevailing consensus, the meaning of the term changes over time. For example, hot dark matter would not have been considered non-standard in 1990, but would be in 2010. Conversely, a non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in 2010.