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File1 - School of Astronomy, IPM
... (2) There is a Asymmetry between the matter and antimatter ( i.e. Baryons and Anti-Baryons, leptons and Anti-leptons). How big this asymmetry should be to allow the formation of planets and eventually the life ? Cosmic Initial condition for Habitable Universe, S.Rahvar (arXiv:1608.00967) ...
... (2) There is a Asymmetry between the matter and antimatter ( i.e. Baryons and Anti-Baryons, leptons and Anti-leptons). How big this asymmetry should be to allow the formation of planets and eventually the life ? Cosmic Initial condition for Habitable Universe, S.Rahvar (arXiv:1608.00967) ...
Great Observatories Origins Deep Survey (GOODS) Observation
... • Coordinate the space by means of static reference points in the sky. • Four such (quasi) static points are the equinoxes and solstices. • We use the Spring Solstice as the zero point of one coordinate. • CAUTION! The solstice actually ...
... • Coordinate the space by means of static reference points in the sky. • Four such (quasi) static points are the equinoxes and solstices. • We use the Spring Solstice as the zero point of one coordinate. • CAUTION! The solstice actually ...
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 ...
Section 19.3
... It implies that the universe must have had a beginning. Astronomers today believe the universe exploded outward from a single point. This idea is known as the Big Bang theory. ...
... It implies that the universe must have had a beginning. Astronomers today believe the universe exploded outward from a single point. This idea is known as the Big Bang theory. ...
Universal redshift, the Hubble constant The cosmic background
... When the temperature dropped below 3000 K, some 5 ∗ 105 years after the Big–Bang ...
... When the temperature dropped below 3000 K, some 5 ∗ 105 years after the Big–Bang ...
Astrophysics * Glossary - Uplift Summit International
... In 1960 it was proposed that sometime during the early history of the Universe it was at a sufficiently high temperature to produce helium by fusion. In this process many high energy photons would be produced. The CMB (Cosmic Microwave Background Radiation) radiation was emitted only a few hundred t ...
... In 1960 it was proposed that sometime during the early history of the Universe it was at a sufficiently high temperature to produce helium by fusion. In this process many high energy photons would be produced. The CMB (Cosmic Microwave Background Radiation) radiation was emitted only a few hundred t ...
Expansion of the Universe
... Time, space and matter all began with the Big Bang. In a fraction of a second, the Universe grew from smaller than a single atom to bigger than a galaxy and it kept on growing at a fantastic rate It is still expanding today After the big bang, the universe expanded quickly (and continues to expa ...
... Time, space and matter all began with the Big Bang. In a fraction of a second, the Universe grew from smaller than a single atom to bigger than a galaxy and it kept on growing at a fantastic rate It is still expanding today After the big bang, the universe expanded quickly (and continues to expa ...
PPT - Wayne State University Physics and Astronomy
... This dark matter is believed to surround most galaxies, and the massto-light ratio for certain galaxies can exceed 300 times that of the sun. ...
... This dark matter is believed to surround most galaxies, and the massto-light ratio for certain galaxies can exceed 300 times that of the sun. ...
IOSR Journal of Applied Physics (IOSR-JAP) e-ISSN: 2278-4861.
... hydrogen atoms per cubic meter. All the dark energy in our solar system amounts to the mass of a small asteroid [which is much smaller than our planet], making it an utterly inconsequential player in the dance of the planets. Its effects stand out only when viewed over vast distances and spans of ti ...
... hydrogen atoms per cubic meter. All the dark energy in our solar system amounts to the mass of a small asteroid [which is much smaller than our planet], making it an utterly inconsequential player in the dance of the planets. Its effects stand out only when viewed over vast distances and spans of ti ...
The Adventures of π-Man: Measuring the Universe
... expansion of the universe will slow down and eventually reverse. If the curvature of space is negative, then the universe is infinite and its expansion will continue unimpeded forever. If the universe is Euclidean (curvature = 0), then the universe will also continue to expand, but at an ever-slowin ...
... expansion of the universe will slow down and eventually reverse. If the curvature of space is negative, then the universe is infinite and its expansion will continue unimpeded forever. If the universe is Euclidean (curvature = 0), then the universe will also continue to expand, but at an ever-slowin ...
Post-class version
... we give it a name anyway: dark energy. Dark energy is a property of space itself, even in vacuum. If we assume the dark energy has certain properties, then it has the equivalent of enough mass to bring the average density of the universe up to the critical value. (Remember ...
... we give it a name anyway: dark energy. Dark energy is a property of space itself, even in vacuum. If we assume the dark energy has certain properties, then it has the equivalent of enough mass to bring the average density of the universe up to the critical value. (Remember ...
Position in Solar System ppt
... the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there were smaller clumps dense clouds ofFinally, gas and dust began had to more collapse gravity. under the weight about ...
... the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there were smaller clumps dense clouds ofFinally, gas and dust began had to more collapse gravity. under the weight about ...
P1 - Foundation
... The Big Bang theory The theory states that about 13.7 billion years ago all the matter in the Universe began to enlarge rapidly in a hot explosion, and it is still expanding today. Evidence for the Big Bang includes: • all the galaxies are moving away from us (red shift) • the further away a galaxy ...
... The Big Bang theory The theory states that about 13.7 billion years ago all the matter in the Universe began to enlarge rapidly in a hot explosion, and it is still expanding today. Evidence for the Big Bang includes: • all the galaxies are moving away from us (red shift) • the further away a galaxy ...
SGES 1302 INTRODUCTION TO EARTH SYSTEM
... very nearly spatially flat, with local wrinkles where massive objects distort spacetime, just as the surface of a lake is. ...
... very nearly spatially flat, with local wrinkles where massive objects distort spacetime, just as the surface of a lake is. ...
Astronomy Honors Mid term Study Guide
... 23. What is the Hubble Law? 24. What are the Hubble Constant and its currently most accepted value ( in the commonly used units for this constant)? 25. Describe Olber’s Paradox and its resolution (explanation) 26. Describe evidence for the Universe being open, closed , or flat. 27. What is the cosmo ...
... 23. What is the Hubble Law? 24. What are the Hubble Constant and its currently most accepted value ( in the commonly used units for this constant)? 25. Describe Olber’s Paradox and its resolution (explanation) 26. Describe evidence for the Universe being open, closed , or flat. 27. What is the cosmo ...
The Ever Expanding Universe
... especially if they are far away. Our understanding of the Universe depends upon accurate mapping of every structure in the Universe and was begun by the Greeks, Persians and Indians thousand of years ago! Measuring the distance to the first star was a Herculean task that involved over 2000 years of ...
... especially if they are far away. Our understanding of the Universe depends upon accurate mapping of every structure in the Universe and was begun by the Greeks, Persians and Indians thousand of years ago! Measuring the distance to the first star was a Herculean task that involved over 2000 years of ...
What MSU Astronomers Will Do with the SOAR
... • Recently formed test details of “bottom-up” formation scenario • Evolution of cluster population sensitive probe of Dark Matter and Dark Energy • Best “fair sample” of matter content of Universe • Dark vs. normal matter ...
... • Recently formed test details of “bottom-up” formation scenario • Evolution of cluster population sensitive probe of Dark Matter and Dark Energy • Best “fair sample” of matter content of Universe • Dark vs. normal matter ...
Positions in the Solar System
... the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there were smaller clumps dense clouds ofFinally, gas and dust began had to more collapse gravity. under the weight about ...
... the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there were smaller clumps dense clouds ofFinally, gas and dust began had to more collapse gravity. under the weight about ...
Slide 1
... the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there were smaller clumps dense clouds ofFinally, gas and dust began had to more collapse gravity. under the weight about ...
... the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there were smaller clumps dense clouds ofFinally, gas and dust began had to more collapse gravity. under the weight about ...
Scale and Structure of the Universe
... Our galaxy measures approximately 100,000 light years in diameter. It takes 225 million years for our solar system to make one trip around the Milky Way! ...
... Our galaxy measures approximately 100,000 light years in diameter. It takes 225 million years for our solar system to make one trip around the Milky Way! ...
Dark matter
... The universe is flat on large scales; there isn’t enough mass to do the flattening, so there must be energy. If the energy emitted light, we’d have seen it by now, so it must be dark energy. ...
... The universe is flat on large scales; there isn’t enough mass to do the flattening, so there must be energy. If the energy emitted light, we’d have seen it by now, so it must be dark energy. ...
0708 - Astronomy
... What does it mean that distance and velocity are proportional? balloon is stretched (multiplicatively) by some factor we need to think of the Universe the same way Can we trace the expansion back to the point where it began? that “point” is now the whole balloon/whole Universe... so no. ...
... What does it mean that distance and velocity are proportional? balloon is stretched (multiplicatively) by some factor we need to think of the Universe the same way Can we trace the expansion back to the point where it began? that “point” is now the whole balloon/whole Universe... so no. ...
Ch 20 Notes Stars
... • When a scientist observes a galaxy that is 1 billion years away, they are observing light that left the galaxy 1 billion years ago • Scientists don’t know what the galaxy looks like now, but can study similar closer galaxies to piece together the evolution of galaxies • The gas, dust and stars tha ...
... • When a scientist observes a galaxy that is 1 billion years away, they are observing light that left the galaxy 1 billion years ago • Scientists don’t know what the galaxy looks like now, but can study similar closer galaxies to piece together the evolution of galaxies • The gas, dust and stars tha ...
Unit 1
... Bang, only protons and electrons existed Shortly after the BB, temperature and density was high enough for deuterium to form by fusion After 100 seconds or so, temperature cooled enough so that deuterium could fuse into helium nuclei The temperature continued to cool, and fusion stopped after a few ...
... Bang, only protons and electrons existed Shortly after the BB, temperature and density was high enough for deuterium to form by fusion After 100 seconds or so, temperature cooled enough so that deuterium could fuse into helium nuclei The temperature continued to cool, and fusion stopped after a few ...
Universe and Galaxy Short Study Guide
... 17. The Big Bang theory states that the universe began as a point and has been expanding ever since. The ...
... 17. The Big Bang theory states that the universe began as a point and has been expanding ever since. The ...
Universe
![](https://commons.wikimedia.org/wiki/Special:FilePath/Ilc_9yr_moll4096.png?width=300)
The Universe is all of time and space and its contents. The Universe includes planets, stars, galaxies, the contents of intergalactic space, the smallest subatomic particles, and all matter and energy. The observable universe is about 28 billion parsecs (91 billion light-years) in diameter at the present time. The size of the whole Universe is not known and may be infinite. Observations and the development of physical theories have led to inferences about the composition and evolution of the Universe.Throughout recorded history, cosmologies and cosmogonies, including scientific models, have been proposed to explain observations of the Universe. The earliest quantitative geocentric models were developed by ancient Greek philosophers and Indian philosophers. Over the centuries, more precise astronomical observations led to Nicolaus Copernicus's heliocentric model of the Solar System and Johannes Kepler's improvement on that model with elliptical orbits, which was eventually explained by Isaac Newton's theory of gravity. Further observational improvements led to the realization that the Solar System is located in a galaxy composed of billions of stars, the Milky Way. It was subsequently discovered that our galaxy is just one of many. On the largest scales, it is assumed that the distribution of galaxies is uniform and the same in all directions, meaning that the Universe has neither an edge nor a center. Observations of the distribution of these galaxies and their spectral lines have led to many of the theories of modern physical cosmology. The discovery in the early 20th century that galaxies are systematically redshifted suggested that the Universe is expanding, and the discovery of the cosmic microwave background radiation suggested that the Universe had a beginning. Finally, observations in the late 1990s indicated the rate of the expansion of the Universe is increasing indicating that the majority of energy is most likely in an unknown form called dark energy. The majority of mass in the universe also appears to exist in an unknown form, called dark matter.The Big Bang theory is the prevailing cosmological model describing the development of the Universe. Space and time were created in the Big Bang, and these were imbued with a fixed amount of energy and matter; as space expands, the density of that matter and energy decreases. After the initial expansion, the Universe cooled sufficiently to allow the formation first of subatomic particles and later of simple atoms. Giant clouds of these primordial elements later coalesced through gravity to form stars. Assuming that the prevailing model is correct, the age of the Universe is measured to be 7001137990000000000♠13.799±0.021 billion years.There are many competing hypotheses about the ultimate fate of the Universe. Physicists and philosophers remain unsure about what, if anything, preceded the Big Bang. Many refuse to speculate, doubting that any information from any such prior state could ever be accessible. There are various multiverse hypotheses, in which some physicists have suggested that the Universe might be one among many universes that likewise exist.