![Lecture 15.Dark.Matter.Dark.Energy [Autosaved]](http://s1.studyres.com/store/data/001653481_1-24d181abb7aa2350426c5e71bf17efb8-300x300.png)
Lecture 15.Dark.Matter.Dark.Energy [Autosaved]
... “… what we are witnessing is an example of how the identification of dark matter will come about. We cannot expect a claim, beyond any statistical or systematic doubt, from a single experiment, but rather a gradual process. At some point there will be a barely significant excess over known backgroun ...
... “… what we are witnessing is an example of how the identification of dark matter will come about. We cannot expect a claim, beyond any statistical or systematic doubt, from a single experiment, but rather a gradual process. At some point there will be a barely significant excess over known backgroun ...
class 1,S11
... —No, the observable portion of the universe is about 14 billion light-years in radius because the universe is about 14 billion years old. ALSO (not in Ch. 1 of the book), we can “see” only about 4% of the universe, 96% is made of “dark matter” and “dark energy”. ...
... —No, the observable portion of the universe is about 14 billion light-years in radius because the universe is about 14 billion years old. ALSO (not in Ch. 1 of the book), we can “see” only about 4% of the universe, 96% is made of “dark matter” and “dark energy”. ...
Modified Newtonian Mechanics
... of stars that have died or have released non-luminous matter into the universe. There are have been no where near the number of these signs seen to accept this hypothesis. There has not been a single black hole detection as the field has looked for to validate the hidden mass hypothesis. This theory ...
... of stars that have died or have released non-luminous matter into the universe. There are have been no where near the number of these signs seen to accept this hypothesis. There has not been a single black hole detection as the field has looked for to validate the hidden mass hypothesis. This theory ...
Expanding Universe Lab
... 1) Blow up the balloon a little bit. DO NOT TIE IT SHUT! 2) Draw and number ten galaxies (dots) on the balloon. Mark one of these galaxies as the reference galaxy. 3) Measure the distance between the reference galaxy and each of the numbered galaxies. The easiest way to do this is to use a piece of ...
... 1) Blow up the balloon a little bit. DO NOT TIE IT SHUT! 2) Draw and number ten galaxies (dots) on the balloon. Mark one of these galaxies as the reference galaxy. 3) Measure the distance between the reference galaxy and each of the numbered galaxies. The easiest way to do this is to use a piece of ...
PowerPoint No. 7 -- The Cosmological Argument (II)
... – The only way that the universe can be expanding in all directions at the same rate is if, at some finite time in the past, the entire universe had been a single, infinitely dense point. – The initial expansion of this single, infinitely dense point is known as the “Big Bang.” – Scientists’ best e ...
... – The only way that the universe can be expanding in all directions at the same rate is if, at some finite time in the past, the entire universe had been a single, infinitely dense point. – The initial expansion of this single, infinitely dense point is known as the “Big Bang.” – Scientists’ best e ...
Where Did It All Come From? - SCIPP
... Why? Vacuum energy changes in time and space due to quantum effects, causing inflation to end at different times in different places. In fact, these variations create the density fluctuations from which galaxies formed. Soon ...
... Why? Vacuum energy changes in time and space due to quantum effects, causing inflation to end at different times in different places. In fact, these variations create the density fluctuations from which galaxies formed. Soon ...
The Warped Side of Dark Matter - Kapteyn Astronomical Institute
... Contaldi of the Canadian Institute for Theoretical Astrophysics in Toronto and colleagues. “The combination of [cosmic microwave background radiation] and weak-lensing data provides some of the most powerful constraints available in cosmology today,” the team writes. Another promising way to chart d ...
... Contaldi of the Canadian Institute for Theoretical Astrophysics in Toronto and colleagues. “The combination of [cosmic microwave background radiation] and weak-lensing data provides some of the most powerful constraints available in cosmology today,” the team writes. Another promising way to chart d ...
Section 7 The Big Bang Theory
... therefore predicts that the universe should now, 13.7 billion years later, have a very cool temperature. If we can measure this temperature we can see if it accords with Big Bang theory. If we can understand stellar temperatures, it can help us know how to find the average temperature of the univers ...
... therefore predicts that the universe should now, 13.7 billion years later, have a very cool temperature. If we can measure this temperature we can see if it accords with Big Bang theory. If we can understand stellar temperatures, it can help us know how to find the average temperature of the univers ...
Solar Magnetism in Little Ice Age, Orbits in Solar Ecliptic
... The beginning of this article is a few years ago, when I wrote about the Little Ice Age of 1645-1715 and how magnetic fields in the Sun restrict the motion of charged particles. This was followed by a 2013 letter in Astronomy magazine that made me wonder why planets orbit in the Sun’s ecliptic plane ...
... The beginning of this article is a few years ago, when I wrote about the Little Ice Age of 1645-1715 and how magnetic fields in the Sun restrict the motion of charged particles. This was followed by a 2013 letter in Astronomy magazine that made me wonder why planets orbit in the Sun’s ecliptic plane ...
speech on dark matter
... anything through my lectures and reading, it is that there are STILL some major problems with our comprehension of the universe that we exist in. Before my studies I (somewhat naively perhaps) assumed that after the existence and findings of great minds such as Aristotle, Galileo, and Einstein, that ...
... anything through my lectures and reading, it is that there are STILL some major problems with our comprehension of the universe that we exist in. Before my studies I (somewhat naively perhaps) assumed that after the existence and findings of great minds such as Aristotle, Galileo, and Einstein, that ...
class 1,F10
... —No, the observable portion of the universe is about 14 billion light-years in radius because the universe is about 14 billion years old. ALSO (not in Ch. 1 of the book), we can “see” only about 4% of the universe, 96% is made of “dark matter” and “dark energy”. ...
... —No, the observable portion of the universe is about 14 billion light-years in radius because the universe is about 14 billion years old. ALSO (not in Ch. 1 of the book), we can “see” only about 4% of the universe, 96% is made of “dark matter” and “dark energy”. ...
Anthropic Principle - Evidence for Christianity
... • Right relation to supernovae: – More or closer – exterminate life – Less or further – too few heavy elements ...
... • Right relation to supernovae: – More or closer – exterminate life – Less or further – too few heavy elements ...
teachers version.
... What is the cosmic background radiation and what does it have to do with the big bang? Student Answer: The universe used to be very hot and emitting light for that temperature. Shortly after the Big Bang, the universe became transparent to this light and it freely and in all directions. As time went ...
... What is the cosmic background radiation and what does it have to do with the big bang? Student Answer: The universe used to be very hot and emitting light for that temperature. Shortly after the Big Bang, the universe became transparent to this light and it freely and in all directions. As time went ...
The Hubble Space Telescope - the first 10 years
... • Hence if we know how bright a star SHOULD be and we measure how bright it ACTUALLY is we can estimate the distance • This relies on finding stars with KNOWN brightness and luckily their exist a class of star known as Cepheids which pulsate according to their brightness • We can use these to measur ...
... • Hence if we know how bright a star SHOULD be and we measure how bright it ACTUALLY is we can estimate the distance • This relies on finding stars with KNOWN brightness and luckily their exist a class of star known as Cepheids which pulsate according to their brightness • We can use these to measur ...
Lec16_2D
... Since the galaxies are moving away from each other, gravity will not necessarily cause a big collapse. So a finite universe is possible. The larger the distance, the larger the velocity. Galaxies at the other end of the universe have their light Doppler shifted out of the optical. No wonder the ...
... Since the galaxies are moving away from each other, gravity will not necessarily cause a big collapse. So a finite universe is possible. The larger the distance, the larger the velocity. Galaxies at the other end of the universe have their light Doppler shifted out of the optical. No wonder the ...
chapter 13 cosmology
... If the universe is expanding and its volume is increasing now, then, in the past, the universe was smaller and things must have been crowded closer together. In fact, this has been confirmed by studying the spacing of the clusters of galaxies that are far away. Recall that we see these clusters at a ...
... If the universe is expanding and its volume is increasing now, then, in the past, the universe was smaller and things must have been crowded closer together. In fact, this has been confirmed by studying the spacing of the clusters of galaxies that are far away. Recall that we see these clusters at a ...
Dark Energy: how the paradigm shifted
... Unfortunately for the inflation plus CDM model, it came with one very odd prediction: it said that the universe is no more than 10 billion years old, whereas, at the time, some stars were thought to be much older. For this reason, and because observations of the distribution of matter favoured a low ...
... Unfortunately for the inflation plus CDM model, it came with one very odd prediction: it said that the universe is no more than 10 billion years old, whereas, at the time, some stars were thought to be much older. For this reason, and because observations of the distribution of matter favoured a low ...
Kavli Institute for Theoretical Physics China（KITPC） Institute of
... Effective Field Theory & Holographic Principle Holographic Principle: ...
... Effective Field Theory & Holographic Principle Holographic Principle: ...
File
... If the universe was initially very, very hot as the Big Bang suggests, we should be able to find some remnant of this heat. In 1965, Arno Penzias and Robert Wilson discovered a 2.725 degree Kelvin (-270.425 degree Celsius) Cosmic Microwave Background radiation (CMB) which pervades the observable uni ...
... If the universe was initially very, very hot as the Big Bang suggests, we should be able to find some remnant of this heat. In 1965, Arno Penzias and Robert Wilson discovered a 2.725 degree Kelvin (-270.425 degree Celsius) Cosmic Microwave Background radiation (CMB) which pervades the observable uni ...
Cosmological Structure Formation
... Note that from the ratio Nn/Np~ 1/6 we can already infer that if all neutrons would get incorporated into 4He nuclei, around 25% of the baryon mass would involve Helium ! Not far from the actual number ... ...
... Note that from the ratio Nn/Np~ 1/6 we can already infer that if all neutrons would get incorporated into 4He nuclei, around 25% of the baryon mass would involve Helium ! Not far from the actual number ... ...
- hcstonline.org
... Objects in the Universe: Our universe has been expanding and evolving for 13.7 billion years under the influence of gravitational and nuclear forces. As gravity governs its expansion, organizational patterns, and the movement of celestial bodies, nuclear forces within stars govern its evolution thro ...
... Objects in the Universe: Our universe has been expanding and evolving for 13.7 billion years under the influence of gravitational and nuclear forces. As gravity governs its expansion, organizational patterns, and the movement of celestial bodies, nuclear forces within stars govern its evolution thro ...
Transcript of this week`s podcast
... after the Big Bang, remarkable things occurred in a number of successive distinct phases. The first phase between the moment the Big Bang occurred and around 10-43 of a second later, is what scientists have called the Planck Epoch, in honour of the great German physicist Max Planck (1858-1947). It’s ...
... after the Big Bang, remarkable things occurred in a number of successive distinct phases. The first phase between the moment the Big Bang occurred and around 10-43 of a second later, is what scientists have called the Planck Epoch, in honour of the great German physicist Max Planck (1858-1947). It’s ...
Revision Guide (Unit 2 Module 5) - Pearson Schools and FE Colleges
... • either the universe is not infinite • or the stars are not uniformly distributed • or it is not static (or two or all of these might be true). Today, it is generally accepted that the universe is not infinite, and that it is expanding rather than static. The Cosmological Principle states that t ...
... • either the universe is not infinite • or the stars are not uniformly distributed • or it is not static (or two or all of these might be true). Today, it is generally accepted that the universe is not infinite, and that it is expanding rather than static. The Cosmological Principle states that t ...
Some FAQs and Answers for the Big Bang, Dark Matter, and Dark
... the Universe has stretched by an enormous factor (roughly 1000), which also stretches the wavelength of the light. The glow, which is the CMB, now looks like radiation from a much cooler gas at a temperature 3 Kelvin. This is an actual decrease of the temperature of the Universe by a factor or rough ...
... the Universe has stretched by an enormous factor (roughly 1000), which also stretches the wavelength of the light. The glow, which is the CMB, now looks like radiation from a much cooler gas at a temperature 3 Kelvin. This is an actual decrease of the temperature of the Universe by a factor or rough ...
Learning Targets
... 15.2 Characteristics of Stars 1. I am able to state the characteristics used for classifying stars. 2. I know how to describe what a light-year is. 3. I know how to use a Hertzsprung-Russell diagram to classify stars. 15.3 Lives of Stars 4. I am able to state the life cycle of small and large stars. ...
... 15.2 Characteristics of Stars 1. I am able to state the characteristics used for classifying stars. 2. I know how to describe what a light-year is. 3. I know how to use a Hertzsprung-Russell diagram to classify stars. 15.3 Lives of Stars 4. I am able to state the life cycle of small and large stars. ...
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.