Phys 214. Planets and Life
... When the visible universe was only one hundred millionth its present size, its temperature was much hotter (273 million K) and denser - the hydrogen was completely ionized into free protons and electrons. ...
... When the visible universe was only one hundred millionth its present size, its temperature was much hotter (273 million K) and denser - the hydrogen was completely ionized into free protons and electrons. ...
moderncos
... the mass in the universe is some form(s) of non-luminous and unknown DARK MATTER… Is this enough to understand the fate of the universe? ...
... the mass in the universe is some form(s) of non-luminous and unknown DARK MATTER… Is this enough to understand the fate of the universe? ...
Local Group Dwarfs
... The way these are related defines who is in charge – gravity or QED Funny feature: a Planck mass into the formula for Compton, Schwarzschild lengths = Planck length Also, all times are equal. Meaning? Planck mass = black hole that exists for Planck time! ...
... The way these are related defines who is in charge – gravity or QED Funny feature: a Planck mass into the formula for Compton, Schwarzschild lengths = Planck length Also, all times are equal. Meaning? Planck mass = black hole that exists for Planck time! ...
Faux Final
... appearances of each type of galaxy. 13) What is the “local group” of galaxies and what are the most massive galaxies in it? 14) What is the evidence for dark matter? 15) Sketch, for galaxies within 1000 Mpc, the velocity-distance diagram. State the common name of the diagram. What is the implication ...
... appearances of each type of galaxy. 13) What is the “local group” of galaxies and what are the most massive galaxies in it? 14) What is the evidence for dark matter? 15) Sketch, for galaxies within 1000 Mpc, the velocity-distance diagram. State the common name of the diagram. What is the implication ...
Astro-2: History of the Universe
... • A scientific theory is a logically self-consistent model or framework for describing the behavior of a related set of natural or social phenomena. • It originates from and/or is supported by experimental evidence. • In this sense, a theory is a systematic and formalized expression of all previo ...
... • A scientific theory is a logically self-consistent model or framework for describing the behavior of a related set of natural or social phenomena. • It originates from and/or is supported by experimental evidence. • In this sense, a theory is a systematic and formalized expression of all previo ...
Lecture6
... • A scientific theory is a logically self-consistent model or framework for describing the behavior of a related set of natural or social phenomena. • It originates from and/or is supported by experimental evidence. • In this sense, a theory is a systematic and formalized expression of all previous ...
... • A scientific theory is a logically self-consistent model or framework for describing the behavior of a related set of natural or social phenomena. • It originates from and/or is supported by experimental evidence. • In this sense, a theory is a systematic and formalized expression of all previous ...
Space Study Guide
... The dust and gas collapsed in on itself because of accretion (the coming together because of gravity) and formed the sun (same process as other stars). As the cloud collapsed, it formed into a rotating disk and spun faster and faster which caused it to flatten. Planetesimals, or particles that becom ...
... The dust and gas collapsed in on itself because of accretion (the coming together because of gravity) and formed the sun (same process as other stars). As the cloud collapsed, it formed into a rotating disk and spun faster and faster which caused it to flatten. Planetesimals, or particles that becom ...
Document
... The Hubble Constant – The slope of the line • The Hubble constant is a very fundamental quantity, which tells us the age of the universe. • Today we see that the universe is expanding, and it is growing larger every day. This means that the distance between galaxies are growing in size. • What woul ...
... The Hubble Constant – The slope of the line • The Hubble constant is a very fundamental quantity, which tells us the age of the universe. • Today we see that the universe is expanding, and it is growing larger every day. This means that the distance between galaxies are growing in size. • What woul ...
HST04-Cosmology - Indico
... For conventional matter content |Ω – 1| ~ t|n| , which increases in time, so universe must have been extremely close to the flat geometry at very early times ...
... For conventional matter content |Ω – 1| ~ t|n| , which increases in time, so universe must have been extremely close to the flat geometry at very early times ...
Assessment language for COS page…
... Here are some diagrams that break the history of the universe into times and show how big the universe was at that time. In the beginning 38. How did the name “Big Bang” get coined? ...
... Here are some diagrams that break the history of the universe into times and show how big the universe was at that time. In the beginning 38. How did the name “Big Bang” get coined? ...
How will the universe end?
... everything except from black holes will tend to ionize black holes probably evaporate due to Hawking radiation – solar mass bhs in 10^66 years and galactic bhs in about 10^99 years neutron stars either ionize or quantum-tunnel into bhs which radiate away eventually all matter turns to iron due to qu ...
... everything except from black holes will tend to ionize black holes probably evaporate due to Hawking radiation – solar mass bhs in 10^66 years and galactic bhs in about 10^99 years neutron stars either ionize or quantum-tunnel into bhs which radiate away eventually all matter turns to iron due to qu ...
1.1 Fundamental Observers
... time of the universe, the time for the Universe to double its size expanding at the present rate. A seemingly inevitable consequence of the universal expansion is that in the past everything in the universe must have been much closer together than it is today. Trace the history back far enough and a ...
... time of the universe, the time for the Universe to double its size expanding at the present rate. A seemingly inevitable consequence of the universal expansion is that in the past everything in the universe must have been much closer together than it is today. Trace the history back far enough and a ...
Lecture 24 Early Universe
... In particle physics, quarks are one of the two basic constituents of matter (the other Standard Model fermions are the leptons). Antiparticles of quarks are called antiquarks. Quarks are the only fundamental particles that interact through all four of the fundamental forces. The word was borrowed by ...
... In particle physics, quarks are one of the two basic constituents of matter (the other Standard Model fermions are the leptons). Antiparticles of quarks are called antiquarks. Quarks are the only fundamental particles that interact through all four of the fundamental forces. The word was borrowed by ...
Cosmology
... Cosmic background radiation is the afterglow of the Big Bang • The cosmic microwave background radiation, corresponding to a temperature of 2.7 K at the present day, is the greatly redshifted remnant of the hot universe as it existed about 380,000 years after the Big Bang • During the first 380,000 ...
... Cosmic background radiation is the afterglow of the Big Bang • The cosmic microwave background radiation, corresponding to a temperature of 2.7 K at the present day, is the greatly redshifted remnant of the hot universe as it existed about 380,000 years after the Big Bang • During the first 380,000 ...
1 - TeacherWeb
... 45. The stars used by navigators because it maintains its position above the north pole is called: 46. What type of star is Polaris, the “north star”? ...
... 45. The stars used by navigators because it maintains its position above the north pole is called: 46. What type of star is Polaris, the “north star”? ...
dark matter
... matter as we know it. It does not emit any electromagnetic radiation, it does not consist of atoms, and we only know it is there from its gravitational effect. There is as yet no clear idea of what dark matter is. It could be hot dark matter – particles with a very small mass moving at speeds close ...
... matter as we know it. It does not emit any electromagnetic radiation, it does not consist of atoms, and we only know it is there from its gravitational effect. There is as yet no clear idea of what dark matter is. It could be hot dark matter – particles with a very small mass moving at speeds close ...
E:\2012-2013\SSU\PHS 207spring 2013\3rd test 4
... 1. Why are Cepheid variable stars important in our study of the Milky Way galaxy? By monitoring a Cepheid star its distance from us can be calculated. Since we assume that nearly all the stars in a cluster are nearly the same age, we can determine the cluster’s age and distance ad some range of the ...
... 1. Why are Cepheid variable stars important in our study of the Milky Way galaxy? By monitoring a Cepheid star its distance from us can be calculated. Since we assume that nearly all the stars in a cluster are nearly the same age, we can determine the cluster’s age and distance ad some range of the ...
Survey of the Universe
... sea of low energy photons that fill the Universe The Cosmic Microwave Background Radiation • Hence they will reach the earth with a reduced energy • So particles with energy greater than 1019 eV must originate within 150 Million Light Years from earth In the Bottom Up scenario, we expect primary cos ...
... sea of low energy photons that fill the Universe The Cosmic Microwave Background Radiation • Hence they will reach the earth with a reduced energy • So particles with energy greater than 1019 eV must originate within 150 Million Light Years from earth In the Bottom Up scenario, we expect primary cos ...
Introducing Higher Physics
... ©Hunterian Museum and Art Gallery, University of Glasgow. Licensor www.scran.ac.uk. ...
... ©Hunterian Museum and Art Gallery, University of Glasgow. Licensor www.scran.ac.uk. ...
Seating Chart for Final Exam PHOTO ID REQUIRED! SIT IN YOUR ASSIGNED ROW!
... Bottom-right plot : shows matter is distributed on the surfaces of giant bubbles. But I also described smaller structures (galaxy clusters, etc). Slide 5: The figures are for an analogy of a bug living on a rubber-sheet universe which is a 2D surface curved into a 3rd spatial dimension. We live in 3 ...
... Bottom-right plot : shows matter is distributed on the surfaces of giant bubbles. But I also described smaller structures (galaxy clusters, etc). Slide 5: The figures are for an analogy of a bug living on a rubber-sheet universe which is a 2D surface curved into a 3rd spatial dimension. We live in 3 ...
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... if the current separation is a0 ? (e) In words, describe what would happen eventually for the two cases E < 0 and E > 0. II (6+3+3+3+3 points) Perhaps without knowing it, you have just described the expanding Universe. All that remains to be done is to reinterpret your equations in terms of a differe ...
... if the current separation is a0 ? (e) In words, describe what would happen eventually for the two cases E < 0 and E > 0. II (6+3+3+3+3 points) Perhaps without knowing it, you have just described the expanding Universe. All that remains to be done is to reinterpret your equations in terms of a differe ...
Measuring Distances: Mph (miles per hour): miles traveled per hour
... universe, and is supported by observa;onal evidence. A Belgian priest named Georges Lemaitre first suggested the Big Bang Theory when he theorized that the universe began from a single atom. Suppor;ng ...
... universe, and is supported by observa;onal evidence. A Belgian priest named Georges Lemaitre first suggested the Big Bang Theory when he theorized that the universe began from a single atom. Suppor;ng ...
Chapter 34: Cosmology FYI 1. Radar Ranging 2. Triangulation idea
... •Each galaxy started by condensation of huge clouds of hydrogen gas. •Particularly dense regions compressed by gravity to for stars. •Currently our universe is dominated by fusion of hydrogen to form helium. •Structure is stable now, but what happens when hydrogen is used up ...
... •Each galaxy started by condensation of huge clouds of hydrogen gas. •Particularly dense regions compressed by gravity to for stars. •Currently our universe is dominated by fusion of hydrogen to form helium. •Structure is stable now, but what happens when hydrogen is used up ...
PPT
... Start and End of Inflation (See Scientific American, Jan. 1999 for articles on the difference between getting stuck for a while in a false vacuum and gradually rolling out of a false vacuum.) The frozen symmetrical field has, at least for a while, a fixed density- driving inflation. • In this scena ...
... Start and End of Inflation (See Scientific American, Jan. 1999 for articles on the difference between getting stuck for a while in a false vacuum and gradually rolling out of a false vacuum.) The frozen symmetrical field has, at least for a while, a fixed density- driving inflation. • In this scena ...
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.