Astronomy 103 Final review session - Home | UW
... Expansion of universe • Edwin Hubble observed that galaxies are all moving away from us • We now know that this is due to the expansion of the universe • Hubble’s Law related recession velocity and distance ...
... Expansion of universe • Edwin Hubble observed that galaxies are all moving away from us • We now know that this is due to the expansion of the universe • Hubble’s Law related recession velocity and distance ...
Origin of the Universe
... Over the thousands of years of human thhking, various cultures have produced a multitude of theories concerning the origin, evolution, and structure of the universe. Universe means everything that exists in any place-all the space, matter, and energy in existence. The majority of scientists today th ...
... Over the thousands of years of human thhking, various cultures have produced a multitude of theories concerning the origin, evolution, and structure of the universe. Universe means everything that exists in any place-all the space, matter, and energy in existence. The majority of scientists today th ...
Introduction of Astronomy Course No.: AST 1010 No. of Credit Hours
... Scientific reasoning is the process of solving problems and learning about the world through the quantitative and qualitative analysis of empirical data. In this course the following competencies are taught, emphasized and assessed. 16. Evaluate reasoning as generally scientific or non-scientific. 1 ...
... Scientific reasoning is the process of solving problems and learning about the world through the quantitative and qualitative analysis of empirical data. In this course the following competencies are taught, emphasized and assessed. 16. Evaluate reasoning as generally scientific or non-scientific. 1 ...
ASTRONOMY 5
... b) Although dark matter emits no visible light, it can be seen with radio telescopes, and such observations confirm that the halo of our Galaxy is full of this material. c) Theoretical models of galaxy formation suggest that a galaxy cannot form unless it has at least 10 times as much matter as we s ...
... b) Although dark matter emits no visible light, it can be seen with radio telescopes, and such observations confirm that the halo of our Galaxy is full of this material. c) Theoretical models of galaxy formation suggest that a galaxy cannot form unless it has at least 10 times as much matter as we s ...
Lecture 20, PPT version
... • if universe has been expanding at constant rate for all time, then all galaxies would have been on top of each other at time equal to 1/H0 Distance between any two galaxy clusters at the present day: distance = speed x time (the standard formula) speed = H0 x distance (Hubble’s Law, specifically) ...
... • if universe has been expanding at constant rate for all time, then all galaxies would have been on top of each other at time equal to 1/H0 Distance between any two galaxy clusters at the present day: distance = speed x time (the standard formula) speed = H0 x distance (Hubble’s Law, specifically) ...
Is space created and destroyed? 9 Feb 16 Feb 2012
... Because wavelengths expand with the universe, the wavelength of the black-body radiation increases with time and the temperature decreases. The temperature of the radiation changes as a-1 . Q: When a very distant gamma-ray burster sent its light out z = 8, was the radiation hot enough to melt ice? ...
... Because wavelengths expand with the universe, the wavelength of the black-body radiation increases with time and the temperature decreases. The temperature of the radiation changes as a-1 . Q: When a very distant gamma-ray burster sent its light out z = 8, was the radiation hot enough to melt ice? ...
1. a) Astronomers use the parallax method to measure
... b) Instead of the parallax method, we use the standard candle method to measure the distance to stars in other galaxies. In particular, we use the standard candle method to measure the distances to Cepheid variable stars in other galaxies. What is special about Cepheid variable stars that makes them ...
... b) Instead of the parallax method, we use the standard candle method to measure the distance to stars in other galaxies. In particular, we use the standard candle method to measure the distances to Cepheid variable stars in other galaxies. What is special about Cepheid variable stars that makes them ...
The New Cosmology: Our Expanding Universe
... The problem with the Ptolemaic model was the epi-circular movements. Since they were added merely for dogmatic and ideological reasons, the problem was that every movement could be explained by means of epi-circles, depending on how big one made the circle and how many of them one invented to do the ...
... The problem with the Ptolemaic model was the epi-circular movements. Since they were added merely for dogmatic and ideological reasons, the problem was that every movement could be explained by means of epi-circles, depending on how big one made the circle and how many of them one invented to do the ...
George`s slides
... • Symmetry breaking in GUT theories is associated with massive Higgs bosons, which are quanta of a scalar field that has an associated poten5al which describes the energy of the field • The false vacuum is a metastable state, with it’s vacuum energy ac5ng as a “nega5ve pressure” causing the univ ...
... • Symmetry breaking in GUT theories is associated with massive Higgs bosons, which are quanta of a scalar field that has an associated poten5al which describes the energy of the field • The false vacuum is a metastable state, with it’s vacuum energy ac5ng as a “nega5ve pressure” causing the univ ...
The New Cosmology: Our Expanding Universe
... The problem with the Ptolemaic model was the epi-circular movements. Since they were added merely for dogmatic and ideological reasons, the problem was that every movement could be explained by means of epi-circles, depending on how big one made the circle and how many of them one invented to do the ...
... The problem with the Ptolemaic model was the epi-circular movements. Since they were added merely for dogmatic and ideological reasons, the problem was that every movement could be explained by means of epi-circles, depending on how big one made the circle and how many of them one invented to do the ...
AS 60 - Astronomy of the Americas
... 5. Is the Milky Way at the center of the Universe? a. Since essentially all galaxies are moving toward the Milky Way, our Galaxy is the center of the Universe b. Since essentially all galaxies are moving away from the Milky Way, our Galaxy is the center of the Universe c. Even though essentially all ...
... 5. Is the Milky Way at the center of the Universe? a. Since essentially all galaxies are moving toward the Milky Way, our Galaxy is the center of the Universe b. Since essentially all galaxies are moving away from the Milky Way, our Galaxy is the center of the Universe c. Even though essentially all ...
Document
... New stars have less and less hydrogen as they become polluted with metals Mass is getting locked up in white dwarfs, neutron stars and ...
... New stars have less and less hydrogen as they become polluted with metals Mass is getting locked up in white dwarfs, neutron stars and ...
Lecture 9
... New stars have less and less hydrogen as they become polluted with metals Mass is getting locked up in white dwarfs, neutron stars and ...
... New stars have less and less hydrogen as they become polluted with metals Mass is getting locked up in white dwarfs, neutron stars and ...
Cosmology
... Describe and explain asteroids and meteorites and that these usually vaporize on entering the Earth’s atmosphere. Binary stars- most stars are part of a binary system and rotate around their common centre of mass. The Big Bang Discuss cosmic background radiation and its discovery. Talk about the sig ...
... Describe and explain asteroids and meteorites and that these usually vaporize on entering the Earth’s atmosphere. Binary stars- most stars are part of a binary system and rotate around their common centre of mass. The Big Bang Discuss cosmic background radiation and its discovery. Talk about the sig ...
The Big Bang Theory:
... by 10 million light years - 100 times the diameter of the horizon. How is this possible? ...
... by 10 million light years - 100 times the diameter of the horizon. How is this possible? ...
universe
... A solar system consists of one or a number of stars, surrounded by a number of planets and planetary bodies held by gravitation. ...
... A solar system consists of one or a number of stars, surrounded by a number of planets and planetary bodies held by gravitation. ...
Study Notes for Chapter 30: Stars, Galaxies, and the Universe
... 9. Absolute magnitude is the true brightness of a star. 10. After its temperature rises to 10,000,000°C, a protostar becomes a star when nuclear fusion begins. 11. Apparent magnitude is the brightness of a star as it appears from Earth. 12. Astronomers believe that cosmic background radiation formed ...
... 9. Absolute magnitude is the true brightness of a star. 10. After its temperature rises to 10,000,000°C, a protostar becomes a star when nuclear fusion begins. 11. Apparent magnitude is the brightness of a star as it appears from Earth. 12. Astronomers believe that cosmic background radiation formed ...
Thesis: The Big Bang theory is the most widely accepted scientific
... supporting the theory is overwhelming, and the predictions based on the theory about the behavior of matter and energy in the universe have consistently been demonstrated in reality. Physicists and cosmologists continue to elaborate upon the basic concepts of the model using data from increasingly s ...
... supporting the theory is overwhelming, and the predictions based on the theory about the behavior of matter and energy in the universe have consistently been demonstrated in reality. Physicists and cosmologists continue to elaborate upon the basic concepts of the model using data from increasingly s ...
Study Notes for Chapter 30:
... Scientists determine the composition and temperature of stars by analyzing the ________ of the light that stars emit. ...
... Scientists determine the composition and temperature of stars by analyzing the ________ of the light that stars emit. ...
Study Notes for Chapter 30:
... Scientists determine the composition and temperature of stars by analyzing the ________ of the light that stars emit. ...
... Scientists determine the composition and temperature of stars by analyzing the ________ of the light that stars emit. ...
GR Cosmology: The Robertson
... Einstein 1905 Special Relativity, 1915: General Relativity with cosmological constant (quote Einstein…) see: ...
... Einstein 1905 Special Relativity, 1915: General Relativity with cosmological constant (quote Einstein…) see: ...
THE BIG BANG - Santa Cruz Institute for Particle Physics
... In the past, the universe must have been much hotter: Big Bang. Gamow, Peebles: if true, there should be a ``glow” left over from this huge explosion (but of microwave radiation, not light). Objects give off a characteristic spectrum of electromagnetic radiation depending on their temperature; ``bla ...
... In the past, the universe must have been much hotter: Big Bang. Gamow, Peebles: if true, there should be a ``glow” left over from this huge explosion (but of microwave radiation, not light). Objects give off a characteristic spectrum of electromagnetic radiation depending on their temperature; ``bla ...
PODSTAWY FIZYKI ŚRODOWISKA
... • What is outside the universe? • What is the universe like right now ? • How did it get there ? The anthropic principle • The weak anthropic principle states that the universe must be compatible with our existence. • The strong anthropic principle states that the universe is such as it is because i ...
... • What is outside the universe? • What is the universe like right now ? • How did it get there ? The anthropic principle • The weak anthropic principle states that the universe must be compatible with our existence. • The strong anthropic principle states that the universe is such as it is because i ...
universe - Northwest ISD Moodle
... 3. What is dark matter, and why can’t it be detected via optical (light) or radio astronomy? 4. How old do scientists think the Universe is, and how do they ...
... 3. What is dark matter, and why can’t it be detected via optical (light) or radio astronomy? 4. How old do scientists think the Universe is, and how do they ...
Cosmic Times - Klenk Astronomy
... • Albert Einstein’s Theory of Relativity and Law of Gravitation was confirmed when the light from stars was bent around the sun • Einstein’s model also predicted that the universe is either expanding or contracting • He didn’t like this so he added a universal (or cosmological ...
... • Albert Einstein’s Theory of Relativity and Law of Gravitation was confirmed when the light from stars was bent around the sun • Einstein’s model also predicted that the universe is either expanding or contracting • He didn’t like this so he added a universal (or cosmological ...
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.