![The Observable Universe: Redshift, Distances and the Hubble-Law](http://s1.studyres.com/store/data/015911243_1-48a1d4e19d436cb152f691c4b9eae9a5-300x300.png)
The Observable Universe: Redshift, Distances and the Hubble-Law
... • Most of galaxies and all Quasars have redshifted Spectra (cosmological redshift, not gravitational). • Hubble found: cz = H0 d , z < 0,1. • The Hubble Constant has to be calibrated: Cepheids and SN-Methods are nowadays the most important Distance Indicators: H0 = 72+/-5 km/s/Mpc. • Hubble-Law can ...
... • Most of galaxies and all Quasars have redshifted Spectra (cosmological redshift, not gravitational). • Hubble found: cz = H0 d , z < 0,1. • The Hubble Constant has to be calibrated: Cepheids and SN-Methods are nowadays the most important Distance Indicators: H0 = 72+/-5 km/s/Mpc. • Hubble-Law can ...
GCSE P1 1.5.4 Red shift
... The Doppler effect also occurs with light waves. We can use a prism or a diffraction grating to split the light coming from stars in galaxies into a spectrum. As you already know, the wavelength of light increases across the spectrum from blue to red. Analysis of the spectra of light from stars in d ...
... The Doppler effect also occurs with light waves. We can use a prism or a diffraction grating to split the light coming from stars in galaxies into a spectrum. As you already know, the wavelength of light increases across the spectrum from blue to red. Analysis of the spectra of light from stars in d ...
Chapter 1-Thinking about the universe
... empty space has particles but cant be included into the formula because their energy cannot be calculated. Even by canceling out infinities and other factors, the answers still have a very high chance of coming out wrong and giving you bad info, which is where string theory comes into play. These so ...
... empty space has particles but cant be included into the formula because their energy cannot be calculated. Even by canceling out infinities and other factors, the answers still have a very high chance of coming out wrong and giving you bad info, which is where string theory comes into play. These so ...
OGT TYPE QUESTIONS
... Nuclear fusion is the process by which two or more nuclei with small masses (such as hydrogen) join together, or fuse, to form a larger, more massive nucleus (such as helium). During this process, a massive amount of energy and radioactive emissions (such as gamma rays) are produced. Combustion, and ...
... Nuclear fusion is the process by which two or more nuclei with small masses (such as hydrogen) join together, or fuse, to form a larger, more massive nucleus (such as helium). During this process, a massive amount of energy and radioactive emissions (such as gamma rays) are produced. Combustion, and ...
Cosmology
... – We can see only a finite distance (~13 billion light years). – For more distant objects the light has not had time to reach us. – Edge of universe (from our perspective) is the cosmic light horizon ...
... – We can see only a finite distance (~13 billion light years). – For more distant objects the light has not had time to reach us. – Edge of universe (from our perspective) is the cosmic light horizon ...
Wilmslow Guild Lecture 2008
... by observing distant galaxies, which are of course further back in time. In a series of papers in the 1950’s, Sir Fred Hoyle, with colleagues Fowler and the Burbridges, established the principle of stellar nucleosynthesis. As a star runs out of hydrogen, the helium “ash” in the core contracts and he ...
... by observing distant galaxies, which are of course further back in time. In a series of papers in the 1950’s, Sir Fred Hoyle, with colleagues Fowler and the Burbridges, established the principle of stellar nucleosynthesis. As a star runs out of hydrogen, the helium “ash” in the core contracts and he ...
U7 Review WS KEY
... c. galactic clusters b. cosmic background radiation d. abundance of light elements (H, He and Li) The first elements that were formed in the universe were? a. hydrogen and lithium c. hydrogen and helium b. lithium and helium d. lithium and beryllium 10. I can describe tools and models used by scie ...
... c. galactic clusters b. cosmic background radiation d. abundance of light elements (H, He and Li) The first elements that were formed in the universe were? a. hydrogen and lithium c. hydrogen and helium b. lithium and helium d. lithium and beryllium 10. I can describe tools and models used by scie ...
PHYSICS 113 Assignment #9 SOLUTIONS Chapter 17 13. Starting
... particles in the gas causes the gas to radiate energy at all wavelengths in the EM spectrum. It is this radiation from the hot gas that we see as the tremendous outpouring of energy from quasars. ...
... particles in the gas causes the gas to radiate energy at all wavelengths in the EM spectrum. It is this radiation from the hot gas that we see as the tremendous outpouring of energy from quasars. ...
AV_Paper1_TheAgeOfTheUniverse
... “Since the beginning of time,” is a hackneyed phrase, attached with some arbitrary subject, that looks to exaggerate any issue its paired with. Although the use of the phrase highlights an individual’s vague grasp on the depth of time and use of uninspired hyperbole, one could find it surprising th ...
... “Since the beginning of time,” is a hackneyed phrase, attached with some arbitrary subject, that looks to exaggerate any issue its paired with. Although the use of the phrase highlights an individual’s vague grasp on the depth of time and use of uninspired hyperbole, one could find it surprising th ...
Answers The Universe Year 10 Science Chapter 6
... 2 We belong to the Milky Way galaxy. 3 Cosmology is the study of the origin , the growth, the evolution, and the eventual fate of the universe. 4 Astronomy is the study of nebulae, galaxies, stars, planets, moons, comets, and asteroids. 5 Astrophysics is the study of the physical laws and theori ...
... 2 We belong to the Milky Way galaxy. 3 Cosmology is the study of the origin , the growth, the evolution, and the eventual fate of the universe. 4 Astronomy is the study of nebulae, galaxies, stars, planets, moons, comets, and asteroids. 5 Astrophysics is the study of the physical laws and theori ...
distance to the centre of the Milky Way.
... In ~1900, “Universe” = the distribution of stars within which we find ourselves (i.e. the Milky Way). It was believed to lie in a vast (perhaps infinite) void. ...
... In ~1900, “Universe” = the distribution of stars within which we find ourselves (i.e. the Milky Way). It was believed to lie in a vast (perhaps infinite) void. ...
Introduction to the Universe
... Students know the structure of the atom and know it is composed of protons, neutrons, and electrons. Students know that compounds are formed by combining two or more different elements and that compounds have properties that are different from their constituent elements. ...
... Students know the structure of the atom and know it is composed of protons, neutrons, and electrons. Students know that compounds are formed by combining two or more different elements and that compounds have properties that are different from their constituent elements. ...
Phys 214. Planets and Life
... Massive stars, with denser and hotter cores, burn faster their fuel than smaller stars, living shorter (only a few million years). Smaller stars, like our Sun, live much longer, 10 billions years. Very small star can live up to hundreds of billions of years. ...
... Massive stars, with denser and hotter cores, burn faster their fuel than smaller stars, living shorter (only a few million years). Smaller stars, like our Sun, live much longer, 10 billions years. Very small star can live up to hundreds of billions of years. ...
2. Velocity dispersions of galaxies
... • Cosmology is the scientific study of the large scale properties of the Universe as a whole. • It endeavors to use the scientific method to understand the origin, evolution and ultimate fate of the entire Universe. • Cosmology involves the formation of theories or hypotheses about the universe whic ...
... • Cosmology is the scientific study of the large scale properties of the Universe as a whole. • It endeavors to use the scientific method to understand the origin, evolution and ultimate fate of the entire Universe. • Cosmology involves the formation of theories or hypotheses about the universe whic ...
Space Study Guide
... As technology increased, scientists made more and more observations that supported the Big Bang Model. 1. In 1929, Edwin Hubble observed that the spectral lines from other galaxies tended to always shift toward the red end of the spectrum. According to the Doppler Effect, causes this change of obser ...
... As technology increased, scientists made more and more observations that supported the Big Bang Model. 1. In 1929, Edwin Hubble observed that the spectral lines from other galaxies tended to always shift toward the red end of the spectrum. According to the Doppler Effect, causes this change of obser ...
Outline 8: History of the Universe and Solar System
... • Is the Universe 20 BY old? • No, gravitational forces have slowed down the galaxies since the Big Bang. • (Note: Recent observations suggest this was the case for the first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. Thi ...
... • Is the Universe 20 BY old? • No, gravitational forces have slowed down the galaxies since the Big Bang. • (Note: Recent observations suggest this was the case for the first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. Thi ...
class 1,S11
... —No, the observable portion of the universe is about 14 billion light-years in radius because the universe is about 14 billion years old. ALSO (not in Ch. 1 of the book), we can “see” only about 4% of the universe, 96% is made of “dark matter” and “dark energy”. ...
... —No, the observable portion of the universe is about 14 billion light-years in radius because the universe is about 14 billion years old. ALSO (not in Ch. 1 of the book), we can “see” only about 4% of the universe, 96% is made of “dark matter” and “dark energy”. ...
GY 112 Lecture Notes - University of South Alabama
... 100,000,000th of a second. No one has yet figured out how or why the Big Bang occurred. Religious people (some scientists included), also wonder if there is a “who” to consider in all this too. The Big Bang is the most scientifically correct explanation for the origin of the Universe and all of the ...
... 100,000,000th of a second. No one has yet figured out how or why the Big Bang occurred. Religious people (some scientists included), also wonder if there is a “who” to consider in all this too. The Big Bang is the most scientifically correct explanation for the origin of the Universe and all of the ...
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 ...
E:\2012-2013\SSU\PHS 207spring 2013\3rd test 4
... cluster’s age and distance ad some range of the galaxy. 2. What is the difference between an open cluster, an association, and a globular cluster? In which components of the Galaxy does each lie? In the disk portion of a galaxy An open cluster is a group of up to a few thousand stars that are roughl ...
... cluster’s age and distance ad some range of the galaxy. 2. What is the difference between an open cluster, an association, and a globular cluster? In which components of the Galaxy does each lie? In the disk portion of a galaxy An open cluster is a group of up to a few thousand stars that are roughl ...
class 1,F10
... —No, the observable portion of the universe is about 14 billion light-years in radius because the universe is about 14 billion years old. ALSO (not in Ch. 1 of the book), we can “see” only about 4% of the universe, 96% is made of “dark matter” and “dark energy”. ...
... —No, the observable portion of the universe is about 14 billion light-years in radius because the universe is about 14 billion years old. ALSO (not in Ch. 1 of the book), we can “see” only about 4% of the universe, 96% is made of “dark matter” and “dark energy”. ...
September 3 and 5 slides
... arrive at your eyes (and the farther back in time you are seeing when you look at the more distant object). ...
... arrive at your eyes (and the farther back in time you are seeing when you look at the more distant object). ...
Word
... Modern scientific cosmology, i.e. the Big Bang models for the Universe, is based on just a few very simple observations about the Universe. The resulting theory is generally accepted as providing a good description of the origin and evolution of our Universe because it then explains, or even predict ...
... Modern scientific cosmology, i.e. the Big Bang models for the Universe, is based on just a few very simple observations about the Universe. The resulting theory is generally accepted as providing a good description of the origin and evolution of our Universe because it then explains, or even predict ...
Universe and Stars Project Final Due Date
... Include at least 2 video clips, no longer than 8 min each. (25pts) Your powerpoint slides must address the following topics ( 100pts): 1. Describe how the Universe was formed and provide at least 3 pieces of evidence of the Big Bang. ( LT A) Make sure you include what red shift and steady state mean ...
... Include at least 2 video clips, no longer than 8 min each. (25pts) Your powerpoint slides must address the following topics ( 100pts): 1. Describe how the Universe was formed and provide at least 3 pieces of evidence of the Big Bang. ( LT A) Make sure you include what red shift and steady state mean ...
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.