Key Topics Astronomy Unit
... 2. If the universe was initially very hot as the big bang suggests, there should be remnants of this radiation. • In 1965, Radioastronomers Arno Penzias and Robert Wilson discovered Cosmic Background Radiation, which supports the Big Bang. 3. The abundance of “light elements” Hydrogen and Helium fou ...
... 2. If the universe was initially very hot as the big bang suggests, there should be remnants of this radiation. • In 1965, Radioastronomers Arno Penzias and Robert Wilson discovered Cosmic Background Radiation, which supports the Big Bang. 3. The abundance of “light elements” Hydrogen and Helium fou ...
Cosmology
... What is the principal observational evidence that the age of the Universe is about 14 billion years? A. The oldest rocks (carbonaceous chondrites) in the solar system indicate an age of 14 billion years; B. Radioactive decay of heavy elements created in the Big Bang indicates an age of 14 billion y ...
... What is the principal observational evidence that the age of the Universe is about 14 billion years? A. The oldest rocks (carbonaceous chondrites) in the solar system indicate an age of 14 billion years; B. Radioactive decay of heavy elements created in the Big Bang indicates an age of 14 billion y ...
TR-16
... Because of the rapid expansion and cooling of the early universe, matter had decoupled from radiation at a temperature of 3000 K. That blackbody radiation characteristic of 3000 K several billion years ago has Doppler-shifted to 3 K today. Satellite measurements show a nearly isotropic 3 K radiation ...
... Because of the rapid expansion and cooling of the early universe, matter had decoupled from radiation at a temperature of 3000 K. That blackbody radiation characteristic of 3000 K several billion years ago has Doppler-shifted to 3 K today. Satellite measurements show a nearly isotropic 3 K radiation ...
hot
... stable lifetimes of such stars elements that are more massive than iron form during supernova events ...
... stable lifetimes of such stars elements that are more massive than iron form during supernova events ...
Physics Chapter 22 Notes New book Atoms are composed of
... Nuclear reactors are designed to maintain a controlled, self-sustained chain reaction, for the production of energy. At this point, all nuclear reactors are fission reactors. Bad news: The radioactive by-products of nuclear energy have half-lives of 10,000 years or longer. ...
... Nuclear reactors are designed to maintain a controlled, self-sustained chain reaction, for the production of energy. At this point, all nuclear reactors are fission reactors. Bad news: The radioactive by-products of nuclear energy have half-lives of 10,000 years or longer. ...
Chapter26
... uniform brightness in all directions in the sky. The CMB is highly redshifted radiation produced about a million years after the universe began to expand. cosmological constant — A self-repelling property of space first proposed by Einstein. cosmological principle — The assumption that all observers ...
... uniform brightness in all directions in the sky. The CMB is highly redshifted radiation produced about a million years after the universe began to expand. cosmological constant — A self-repelling property of space first proposed by Einstein. cosmological principle — The assumption that all observers ...
Here - gcisd
... Scientists can now measure the intensity of a galaxy’s redshift and use this value to calculate the galaxy’s distance from Earth and the speed at which it is moving. Scientists still have not developed a way to measure the current size of the universe. The Age of the Universe Visible light is a form ...
... Scientists can now measure the intensity of a galaxy’s redshift and use this value to calculate the galaxy’s distance from Earth and the speed at which it is moving. Scientists still have not developed a way to measure the current size of the universe. The Age of the Universe Visible light is a form ...
Elemental Synthesis in the Universe
... Lake Tagish Meteorite, Jan, 2002, Landed in B.C., 53 tons ...
... Lake Tagish Meteorite, Jan, 2002, Landed in B.C., 53 tons ...
Announcements Homework. Final Exam. Isotropy of the CMB
... brown dwarfs Î new low-mass stars (10 to 100 in existence per galaxy at any given time). • Occasional collisions of degenerate stars Î supernova. ...
... brown dwarfs Î new low-mass stars (10 to 100 in existence per galaxy at any given time). • Occasional collisions of degenerate stars Î supernova. ...
The Life and Death of Stars
... It has been doing this for 4.5 billion years Has enough Hydrogen in the core for 5 billion years What happens when all the core hydrogen is burnt? – the core will collapse, become denser and hotter – Helium starts to fuse into Carbon and Oxygen ...
... It has been doing this for 4.5 billion years Has enough Hydrogen in the core for 5 billion years What happens when all the core hydrogen is burnt? – the core will collapse, become denser and hotter – Helium starts to fuse into Carbon and Oxygen ...
A SUMMARY OF SELF
... 3. The lightest isotopes of many heavy elements are very rare compared to the heavier isotopes, How can this difference be explained? 4. Discuss the time scale for the s-process? What life-time must a nucleus have in order to have time to capture a neutron before it β-decays? The r-process 1. How ma ...
... 3. The lightest isotopes of many heavy elements are very rare compared to the heavier isotopes, How can this difference be explained? 4. Discuss the time scale for the s-process? What life-time must a nucleus have in order to have time to capture a neutron before it β-decays? The r-process 1. How ma ...
Chapter 18 - the Universe Begins
... neutrons and electrons existed. By three seconds old, the Universe contained the basic and simplest elements—almost all hydrogen and some helium. However, it took another 380 000 years before the Universe had cooled sufficiently for photons (i.e. light) to travel freely through space, making it tran ...
... neutrons and electrons existed. By three seconds old, the Universe contained the basic and simplest elements—almost all hydrogen and some helium. However, it took another 380 000 years before the Universe had cooled sufficiently for photons (i.e. light) to travel freely through space, making it tran ...
Worksheet
... form, the mass of the new nucleus is less than the combined mass of the two original nuclei. The difference in mass between the two is released as energy. In stars, this kind of reaction is referred to as stellar nucleosynthesis, but it is more commonly known as nuclear fusion. Nuclear fusion is use ...
... form, the mass of the new nucleus is less than the combined mass of the two original nuclei. The difference in mass between the two is released as energy. In stars, this kind of reaction is referred to as stellar nucleosynthesis, but it is more commonly known as nuclear fusion. Nuclear fusion is use ...
1_Introduction - The Ohio State University Department of
... We can see galaxies billions of light-years away. ...
... We can see galaxies billions of light-years away. ...
AS2001 - University of St Andrews
... Infall of IGM on outskirts + gas migrates to centre. More star generations --> lower at centre. ...
... Infall of IGM on outskirts + gas migrates to centre. More star generations --> lower at centre. ...
I`m using this stupid huge font
... The Copernican Time Principle The current cosmological epoch ...
... The Copernican Time Principle The current cosmological epoch ...
Universe, Galaxies, and Stars – The Basics
... of the rainbow. Maybe you have heard the acronym “ROY G BIV” to help you remember them. The colors are: Red Orange Yellow Green Blue Indigo Violet (ROY G BIV). In order to understand starlight we also need to remember that light is a wave. Different colors have different wavelengths. Of visible ligh ...
... of the rainbow. Maybe you have heard the acronym “ROY G BIV” to help you remember them. The colors are: Red Orange Yellow Green Blue Indigo Violet (ROY G BIV). In order to understand starlight we also need to remember that light is a wave. Different colors have different wavelengths. Of visible ligh ...
Our Universe is big, beautiful… and mostly
... It’s hard to picture just how big the Universe is. For instance, the Earth seems like a big place to us, but you could fit about one million Earths inside our nearest star, the Sun. And the Sun is just one of billions of stars that make up our galaxy, which is called the Milky Way. When you think abo ...
... It’s hard to picture just how big the Universe is. For instance, the Earth seems like a big place to us, but you could fit about one million Earths inside our nearest star, the Sun. And the Sun is just one of billions of stars that make up our galaxy, which is called the Milky Way. When you think abo ...
Mass Outflow in the Seyfert 1 Galaxy NGC 4151
... • At t = 0; matter in state where physics not well understood • At t = 10 millionths of a second –T > 1012K, density ~ 5 x 1013 gm/cc (same as an atomic nucleus) At this point, Universe was entirely in the form of radiation (but, E = M c2) ...
... • At t = 0; matter in state where physics not well understood • At t = 10 millionths of a second –T > 1012K, density ~ 5 x 1013 gm/cc (same as an atomic nucleus) At this point, Universe was entirely in the form of radiation (but, E = M c2) ...
Where are we? Matter is made of atoms and molecules Atoms
... the Universe is cold and low density. as it expands, it cools matter (galaxies) gets further apart. ...
... the Universe is cold and low density. as it expands, it cools matter (galaxies) gets further apart. ...
Lecture 12: Age, Metalicity, and Observations Abundance
... Stellar Mass • The fundamental parameters that seem to determine observed metallicity are mass and SFR. • This forms the fundamental metallicity relation (FMR). • Despite extremely complex underlying physics, the relation exists out to z=2.5 and in a huge range of galaxies/ environments. ...
... Stellar Mass • The fundamental parameters that seem to determine observed metallicity are mass and SFR. • This forms the fundamental metallicity relation (FMR). • Despite extremely complex underlying physics, the relation exists out to z=2.5 and in a huge range of galaxies/ environments. ...
Recent Developments in Cosmology
... Big Bang Nucleosynthesis Origin of the Light Elements: Helium, Deuterium, Lithium,… When the Universe was younger than about 1 minute old, with a Temperature above ~ 1 billion degees, atomic nuclei (e.g., He4 nucleus = 2 neutrons + 2 protons bound together) could not survive: instead the baryons fo ...
... Big Bang Nucleosynthesis Origin of the Light Elements: Helium, Deuterium, Lithium,… When the Universe was younger than about 1 minute old, with a Temperature above ~ 1 billion degees, atomic nuclei (e.g., He4 nucleus = 2 neutrons + 2 protons bound together) could not survive: instead the baryons fo ...
Cosmology2 - NMSU Astronomy
... Hmmm, that still accounts for only about 30% of the critical density!!! Where is the additional 70% that is required for a flat “critical” universe? ...
... Hmmm, that still accounts for only about 30% of the critical density!!! Where is the additional 70% that is required for a flat “critical” universe? ...
BIG BANG ACOUSTICS – SOUND IN THE EARLY UNIVERSE
... sophisticated computational models of the evolving perturbations which include most of the relevant physics. As in many sciences, one can study reality by matching model calculations to observations. In practice, cosmologists add three other datasets to the two acoustic ones, ...
... sophisticated computational models of the evolving perturbations which include most of the relevant physics. As in many sciences, one can study reality by matching model calculations to observations. In practice, cosmologists add three other datasets to the two acoustic ones, ...
Thermodynamics Essay Research Paper The Second Law
... Thermodynamics Essay, Research Paper The Second Law of Thermodynamics The Second Law of Thermodynamics has several variations. One version says that some heat is always wasted when converting heat into mechanical energy. In other words all heat can not be completely converted into mechanical energy. ...
... Thermodynamics Essay, Research Paper The Second Law of Thermodynamics The Second Law of Thermodynamics has several variations. One version says that some heat is always wasted when converting heat into mechanical energy. In other words all heat can not be completely converted into mechanical energy. ...