CEA - Nuclear astrophysics
... astrophysical environments may be defined as follows: • During the first three minutes of the Universe’s existence, the primordial nucleosynthesis took place. This explains the abundance of hydrogen, its isotope (see inset on p. 5) deuterium (1 proton, 1 neutron) and the two stable isotopes of heliu ...
... astrophysical environments may be defined as follows: • During the first three minutes of the Universe’s existence, the primordial nucleosynthesis took place. This explains the abundance of hydrogen, its isotope (see inset on p. 5) deuterium (1 proton, 1 neutron) and the two stable isotopes of heliu ...
SISSA lect 1 28/02/11 and 03/03/11 - INAF
... 1 – Linear theory + Press & Schechter: simple tool to get abundance of collapsed haloes at any redshift 2- Sheth & Tormen and other fitting N-body based formulae Importance of describing the number of haloes at high redshift as a potentially ...
... 1 – Linear theory + Press & Schechter: simple tool to get abundance of collapsed haloes at any redshift 2- Sheth & Tormen and other fitting N-body based formulae Importance of describing the number of haloes at high redshift as a potentially ...
Undergraduate Project in Physics Alon Grubshtein Guided by Prof. Eduardo Guendelman
... It so happens, that there are no stable nuclei of masses 5 and 8, and as a result nuclear reactions rapidly diminish after making helium. Small amounts of other light elements are made, but it is not possible to make significant amounts of heavier nuclei such as carbon (mass 12). These require highe ...
... It so happens, that there are no stable nuclei of masses 5 and 8, and as a result nuclear reactions rapidly diminish after making helium. Small amounts of other light elements are made, but it is not possible to make significant amounts of heavier nuclei such as carbon (mass 12). These require highe ...
P1 The Earth in the Universe
... does now and hasn’t changed. The trouble is that the night sky would be completely lit up because of the billions of stars, but it’s not, so… The “Big Bang” theory This theory states that the universe started off with an explosion and everything has been moving away ever since. There are two main pi ...
... does now and hasn’t changed. The trouble is that the night sky would be completely lit up because of the billions of stars, but it’s not, so… The “Big Bang” theory This theory states that the universe started off with an explosion and everything has been moving away ever since. There are two main pi ...
PRESENTAION
... geometry) of the universe based on the mathematics of fluid dynamics, i.e. it models the matter within the universe as a perfect fluid. Although stars and structures of mass can be introduced into an "almost FLRW" model, a strictly FLRW model is used to approximate the local geometry of the observab ...
... geometry) of the universe based on the mathematics of fluid dynamics, i.e. it models the matter within the universe as a perfect fluid. Although stars and structures of mass can be introduced into an "almost FLRW" model, a strictly FLRW model is used to approximate the local geometry of the observab ...
ISP 205 Final Exam Seating Chart SIT IN CORRECT 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 ...
Essential Question
... Essential Question: How do scientists think our universe was created and what evidence supports it? Big Bang Theory • All galaxies started from one huge mass of densely packed matter • The densely packed matter exploded with a “big bang” sending out matter and energy in all directions • Over time th ...
... Essential Question: How do scientists think our universe was created and what evidence supports it? Big Bang Theory • All galaxies started from one huge mass of densely packed matter • The densely packed matter exploded with a “big bang” sending out matter and energy in all directions • Over time th ...
Dr. David Toback Lecture 19
... – Paper 2 Revision (if desired), Stage 1: due Monday before Class – Paper 3, Stage 1: due next Wednesday before class • If you want feedback on a draft, submit before Sunday at 11:55PM Honor’s Paper: ...
... – Paper 2 Revision (if desired), Stage 1: due Monday before Class – Paper 3, Stage 1: due next Wednesday before class • If you want feedback on a draft, submit before Sunday at 11:55PM Honor’s Paper: ...
Where Does Helium Come from?
... which holds our galaxies together but scientists have found very little evidence beyond theory. In the period between 10−35 and 10−4 s after the Big Bang, the heavier elementary particles such as protons and neutrons, and their antimatter opposites, formed via the pair production process mentioned a ...
... which holds our galaxies together but scientists have found very little evidence beyond theory. In the period between 10−35 and 10−4 s after the Big Bang, the heavier elementary particles such as protons and neutrons, and their antimatter opposites, formed via the pair production process mentioned a ...
The Island Universe of Immanuel Kant - EU-HOU
... much farther galaxies could be measured. As can be easily noticed in the previous slide (right panel), Hubble law works very well: velocity/distance ratio remains constant in a wide range of these two quantities, particularly for more distant galaxies where the proper motions velocities become negli ...
... much farther galaxies could be measured. As can be easily noticed in the previous slide (right panel), Hubble law works very well: velocity/distance ratio remains constant in a wide range of these two quantities, particularly for more distant galaxies where the proper motions velocities become negli ...
threshold 1— the big bang
... we know a lot about what happened a few moments after the Big Bang. What is not clear are the moments immediately before or immediately after the Big Bang. What made the Big Bang possible and why it happened remain mysteries to scientists. • Just after the Big Bang, the temperature and pressure in t ...
... we know a lot about what happened a few moments after the Big Bang. What is not clear are the moments immediately before or immediately after the Big Bang. What made the Big Bang possible and why it happened remain mysteries to scientists. • Just after the Big Bang, the temperature and pressure in t ...
Origin_of_Elements in the stars
... dropped enough to make the existence of free quarks impossible. For a while the number of protons and neutrons was almost the same, until the temperature dropped enough to make its slight mass difference favor the protons. Isolated neutrons are not stable, so the ones that survived are the ones that ...
... dropped enough to make the existence of free quarks impossible. For a while the number of protons and neutrons was almost the same, until the temperature dropped enough to make its slight mass difference favor the protons. Isolated neutrons are not stable, so the ones that survived are the ones that ...
Gold could have come from colliding stars - Horizon Magazine
... Dr Philippe André at the Astrophysics Laboratory of the French Alternative Energies and Atomic Energy Commission in Paris-Saclay and colleagues have been looking into this with a combination of computer simulations and high-resolution images, including those from the 12-metre APEX telescope in Chile ...
... Dr Philippe André at the Astrophysics Laboratory of the French Alternative Energies and Atomic Energy Commission in Paris-Saclay and colleagues have been looking into this with a combination of computer simulations and high-resolution images, including those from the 12-metre APEX telescope in Chile ...
Wild Surmise Study
... from each other so far apart they will never be able to communicate. What we observe as our universe was just one tiny zone that did, indeed, have time to come into local equilibrium. Since the laws that determine electromagnetic radiation, such as light, did not come into existence until a finite t ...
... from each other so far apart they will never be able to communicate. What we observe as our universe was just one tiny zone that did, indeed, have time to come into local equilibrium. Since the laws that determine electromagnetic radiation, such as light, did not come into existence until a finite t ...
dm - The Institute of Mathematical Sciences
... Working backwards it is easy to see that there must have been a time when the Universe was small, indeed a single point at birth. This happened approximately about 14 billion years ago. The fact that the Universe must have been born at a single instant is called the “Big Bang”, a word coined by astr ...
... Working backwards it is easy to see that there must have been a time when the Universe was small, indeed a single point at birth. This happened approximately about 14 billion years ago. The fact that the Universe must have been born at a single instant is called the “Big Bang”, a word coined by astr ...
Evolution_Univ - sdsu
... 2. Luminiferous ether, Albert Michelson and Albert Einstein, how are they linked? 3. How did the work done by one scientist lead to the work done by another scientist in chapter 7? 4. How did Henrietta Leavitt help Ed Hubble? How did Leavitt’s work influence Einstein? Question #7: The Mighty Atom (L ...
... 2. Luminiferous ether, Albert Michelson and Albert Einstein, how are they linked? 3. How did the work done by one scientist lead to the work done by another scientist in chapter 7? 4. How did Henrietta Leavitt help Ed Hubble? How did Leavitt’s work influence Einstein? Question #7: The Mighty Atom (L ...
in the Universe
... the Universe is accelerating, then the expansion was slower in the past, and thus the time required to expand by a given factor is longer, and the distance NOW is larger. ...
... the Universe is accelerating, then the expansion was slower in the past, and thus the time required to expand by a given factor is longer, and the distance NOW is larger. ...
Astronomy 110G Review Sheet for Exam #3 The
... • The radiation from the “big bang” is seen today as the “cosmic background radiation” which peaks at microwave frequencies. This is 10,000°K radiation “cooled” to about 3°K by the redshift associated with the universe’s expansion. It has the predicted uniformity and spectrum to a high degree of acc ...
... • The radiation from the “big bang” is seen today as the “cosmic background radiation” which peaks at microwave frequencies. This is 10,000°K radiation “cooled” to about 3°K by the redshift associated with the universe’s expansion. It has the predicted uniformity and spectrum to a high degree of acc ...
The Origin of the Elements edited by David L. Alles Western Washington University
... Five billion years from now the Sun's hydrogen fuel will be depleted. Gravity will then force the spent core, now almost pure helium, to shrink, compress, and become even hotter than at present. The high temperatures will eventually ignite the helium ashes. The result is carbon nuclei and even more ...
... Five billion years from now the Sun's hydrogen fuel will be depleted. Gravity will then force the spent core, now almost pure helium, to shrink, compress, and become even hotter than at present. The high temperatures will eventually ignite the helium ashes. The result is carbon nuclei and even more ...
PHYS 1400 Sample Exam Questions: Properties of Matter (Atoms) 1
... knows just exactly what the atoms are doing. 18. How did Einstein contribute to our understanding of atoms? A) He did not. His only contribution to physics, general relativity, has nothing to do with atoms. B) He observed that particles suspended in water appear to move, even though they are not ali ...
... knows just exactly what the atoms are doing. 18. How did Einstein contribute to our understanding of atoms? A) He did not. His only contribution to physics, general relativity, has nothing to do with atoms. B) He observed that particles suspended in water appear to move, even though they are not ali ...
PowerPoint No. 7 -- The Cosmological Argument (II)
... 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 estimates indicate the “Big Bang” happened 15 billion years ago. ...
... 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 estimates indicate the “Big Bang” happened 15 billion years ago. ...
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 ...
00:00 [Narrator] 1. The Milky Way galaxy is our cosmic home. But it
... other instruments followed, detecting even fainter and more distant galaxies. From these observations astronomers determined that the Universe contained a total of 120 billion galaxies! ...
... other instruments followed, detecting even fainter and more distant galaxies. From these observations astronomers determined that the Universe contained a total of 120 billion galaxies! ...