Cosmology - Stockton University
... universe being created about 2 billion years ago. • This is a bit of a problem, the geological records here on Earth are older that 2 billion years. Hmmmm • One solution to this quandary is to devise a model of the Universe which, while expanding, doesn't depend on a starting time. ...
... universe being created about 2 billion years ago. • This is a bit of a problem, the geological records here on Earth are older that 2 billion years. Hmmmm • One solution to this quandary is to devise a model of the Universe which, while expanding, doesn't depend on a starting time. ...
WRL3659.tmp - U of L Class Index
... How are Cepheid variables used to determine distances in astronomy? What is a ‘standard candle’? Give two examples. Describe the big bang and steady state accounts of the universe’s history. What are the two principle pieces of evidence favouring the big bang theory? How did Hoyle et al. (in “B2FH”) ...
... How are Cepheid variables used to determine distances in astronomy? What is a ‘standard candle’? Give two examples. Describe the big bang and steady state accounts of the universe’s history. What are the two principle pieces of evidence favouring the big bang theory? How did Hoyle et al. (in “B2FH”) ...
red shift - Scoilnet
... Light is another type of _______, so the Doppler Effect applies to light as well. When a star’s light is red shifted, the star must be moving away from us. To us, almost _______ star looks red shifted, which means they are all moving away. This is only possible if the Universe is ________. The secon ...
... Light is another type of _______, so the Doppler Effect applies to light as well. When a star’s light is red shifted, the star must be moving away from us. To us, almost _______ star looks red shifted, which means they are all moving away. This is only possible if the Universe is ________. The secon ...
Lecture 9
... Why is there more matter than anti-matter? Why is there more photons than baryons? At T ∼ 1012 K (t ∼ 10−4 s), the energy per particle was ∼ 100 MeV. At this temperature, quarks are not bound into individual baryons ⇒ “quark soup”: γ + γ ↔ q + ~q . Assume small asymmetry: δq = ⇒ quark residue ...
... Why is there more matter than anti-matter? Why is there more photons than baryons? At T ∼ 1012 K (t ∼ 10−4 s), the energy per particle was ∼ 100 MeV. At this temperature, quarks are not bound into individual baryons ⇒ “quark soup”: γ + γ ↔ q + ~q . Assume small asymmetry: δq = ⇒ quark residue ...
Dark Energy: back to Newton?
... 75%, the Dark Energy, has not been satisfactorily explained. It can be incorporated into Albert Einstein’s general relativity (GR) by re-admitting into the field equations the cosmological constant, Λ , a term which Einstein introduced in 1917 and subsequently abandoned. In this context Dark Energy ...
... 75%, the Dark Energy, has not been satisfactorily explained. It can be incorporated into Albert Einstein’s general relativity (GR) by re-admitting into the field equations the cosmological constant, Λ , a term which Einstein introduced in 1917 and subsequently abandoned. In this context Dark Energy ...
Slide 1
... wavelengths expected for the light and heat produced in a great explosion. Supporters of the Steady State theory have tried desperately to find an alternative explanation, but they have failed” (Jastrow, God and the Astronomers, 5). ...
... wavelengths expected for the light and heat produced in a great explosion. Supporters of the Steady State theory have tried desperately to find an alternative explanation, but they have failed” (Jastrow, God and the Astronomers, 5). ...
Future Directions for Astronomy at MSU The lab The rest
... • Find through long-term monitoring of radial velocity variations ...
... • Find through long-term monitoring of radial velocity variations ...
Gravity - Indiana University Astronomy
... Discuss with a partner what assumptions might be reasonable for scientists to make about the Universe. List three or four. For each describe why this is a reasonable assumption for our universe, and what the assumptions might imply for the origin, evolution, or structure of our universe. a) ...
... Discuss with a partner what assumptions might be reasonable for scientists to make about the Universe. List three or four. For each describe why this is a reasonable assumption for our universe, and what the assumptions might imply for the origin, evolution, or structure of our universe. a) ...
Components of the Universe Test Review
... 2. The sun is the glowing remains of an older, dying star 3. The sun is a collection of stars held together by ...
... 2. The sun is the glowing remains of an older, dying star 3. The sun is a collection of stars held together by ...
Spiralicity and Motion on Cosmic Scale
... chamber to huge galaxies in the universe. Spiral galaxies are believed to form out of spinning gases and dark dust that made them to come together. The ultraviolet-light observations by the Hubble Space Telescope are unvealing a colourful picture of the universe providing information about the birth ...
... chamber to huge galaxies in the universe. Spiral galaxies are believed to form out of spinning gases and dark dust that made them to come together. The ultraviolet-light observations by the Hubble Space Telescope are unvealing a colourful picture of the universe providing information about the birth ...
The Size of the Universe (1920) Harlow Shapley Heber Curtis
... The Great Debate: The Size of the Universe ...
... The Great Debate: The Size of the Universe ...
The IR Universe
... Spitzer has found optically invisible galaxies so distant that we see them as they were only 3 billion years after the Big Bang. These galaxies are obscured by silicate dust, suggesting that planets could have formed even at this early time in the history of the Universe. ...
... Spitzer has found optically invisible galaxies so distant that we see them as they were only 3 billion years after the Big Bang. These galaxies are obscured by silicate dust, suggesting that planets could have formed even at this early time in the history of the Universe. ...
Modern Cosmology and Buddhism - Shuichi Yamamoto / Victor S
... Between the two current cosmologies, the Big Bang theory is overwhelmingly supported. However, each cosmology also has respective problems that need to be addressed and solved. According to the Big Bang theory, the universe is comprised of two competing energy sources. One is the energy from the ini ...
... Between the two current cosmologies, the Big Bang theory is overwhelmingly supported. However, each cosmology also has respective problems that need to be addressed and solved. According to the Big Bang theory, the universe is comprised of two competing energy sources. One is the energy from the ini ...
JSchreiberTalk3 - FSU High Energy Physics
... Background info (formation/evolution of galaxies) Implications of theories ...
... Background info (formation/evolution of galaxies) Implications of theories ...
A Cosmic End: From the Earth to the Universe
... Galaxy formation and evolution is a complex combination of hierarchical clustering, gas dissipation, merging, and secular evolution. Galaxies are tracers of cosmic evolution over the last 13 billion years. Galactic time scale is the combination of two clocks. One time scale is the cosmological one ( ...
... Galaxy formation and evolution is a complex combination of hierarchical clustering, gas dissipation, merging, and secular evolution. Galaxies are tracers of cosmic evolution over the last 13 billion years. Galactic time scale is the combination of two clocks. One time scale is the cosmological one ( ...
Hubble`s Law
... The Big Bang • Big Bang has no center • Happened everywhere! • Wherever you go, there was the big bang! • So as we talk about the very dense early universe, remember that we are talking about what happened not just far away at the edge of the Universe, but right here! ...smooshed up small, but stil ...
... The Big Bang • Big Bang has no center • Happened everywhere! • Wherever you go, there was the big bang! • So as we talk about the very dense early universe, remember that we are talking about what happened not just far away at the edge of the Universe, but right here! ...smooshed up small, but stil ...
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 ...
Lost in space? - Amazon Web Services
... your fingers, the moon and stars that you set in place — What is man that you are mindful of him, and a son of man that you care for him?” (Psalm 8:4-5) The discoveries of modern astronomy seem to heighten the sense of disorientation, revealing a cosmos much older and larger than our minds can fatho ...
... your fingers, the moon and stars that you set in place — What is man that you are mindful of him, and a son of man that you care for him?” (Psalm 8:4-5) The discoveries of modern astronomy seem to heighten the sense of disorientation, revealing a cosmos much older and larger than our minds can fatho ...
Why is the darkness of the night sky evidence for the Big Bang?
... A wormhole could be kept open by filling its throat, or the region around it, with an ingredient called exotic matter. This is strange stuff which doesn’t exist in the classical physics world, but may be allowed by quantum physics. Exotic matter is repelled, rather than attracted, by gravity and is ...
... A wormhole could be kept open by filling its throat, or the region around it, with an ingredient called exotic matter. This is strange stuff which doesn’t exist in the classical physics world, but may be allowed by quantum physics. Exotic matter is repelled, rather than attracted, by gravity and is ...
cosmology-2005
... *Light in WMAP picture from 379,000 years after the Big Bang. *Content of the Universe: 4% Atoms, 23% Cold Dark Matter, 73% Dark energy. *The data places new constraints on the dark energy. It seems more like a "cosmological constant" than a negative-pressure energy field called "quintessence". But ...
... *Light in WMAP picture from 379,000 years after the Big Bang. *Content of the Universe: 4% Atoms, 23% Cold Dark Matter, 73% Dark energy. *The data places new constraints on the dark energy. It seems more like a "cosmological constant" than a negative-pressure energy field called "quintessence". But ...
Option D Lesson 6 Cosmology and Further - Physics
... Tiny elementary particle that do not interact with other elements. Examples of these are Neutrinos and other elementary particles. ...
... Tiny elementary particle that do not interact with other elements. Examples of these are Neutrinos and other elementary particles. ...
Dark Matter and Dark Energy - Trans
... of particles. As the universe cooled, WIMPs decreased in density, and when the ambient temperature became low enough, WIMP creation all but ceased [12]. These particles, how- ...
... of particles. As the universe cooled, WIMPs decreased in density, and when the ambient temperature became low enough, WIMP creation all but ceased [12]. These particles, how- ...
Document
... a) supernova as standard candles to determine far distances b) patterns of small variation in the CMB c) galaxy rotation measurements ...
... a) supernova as standard candles to determine far distances b) patterns of small variation in the CMB c) galaxy rotation measurements ...
Name Section
... Doppler Shift and the Expanding Universe Your instructor will discuss the Doppler shift of light waves from a moving source. a) A stationery light source emits waves of light uniformly in all directions as shown in the diagram. How do the wavelengths of light from the right side of the diagram compa ...
... Doppler Shift and the Expanding Universe Your instructor will discuss the Doppler shift of light waves from a moving source. a) A stationery light source emits waves of light uniformly in all directions as shown in the diagram. How do the wavelengths of light from the right side of the diagram compa ...
galaxy.
... Shapely (Harvard): Argued that spiral nebulae were inside our galaxy for several reasons • Galaxy was huge (he didn’t know about dust). • van Maanen’s observations showed that one spiral nebula, M 101, could be observed to rotate. It it were outside our galaxy, it would have to be turning faster tha ...
... Shapely (Harvard): Argued that spiral nebulae were inside our galaxy for several reasons • Galaxy was huge (he didn’t know about dust). • van Maanen’s observations showed that one spiral nebula, M 101, could be observed to rotate. It it were outside our galaxy, it would have to be turning faster tha ...
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.