Here - gcisd
... The stars and galaxies that Edwin Hubble observed experienced redshift. In other words, they were moving away from Earth. If galaxies are moving away from Earth (and each other), the universe cannot exist in a steady state. Hubble ultimately concluded the universe must be expanding. He also discover ...
... The stars and galaxies that Edwin Hubble observed experienced redshift. In other words, they were moving away from Earth. If galaxies are moving away from Earth (and each other), the universe cannot exist in a steady state. Hubble ultimately concluded the universe must be expanding. He also discover ...
Olbers` Paradox - NMSU Astronomy
... most easily be dropped? Assumption 1) (homogeneity) has a considerable amount of observational evidence to back it up, and it would be pointless to regard assumption 4) as false, so these two assumptions should be retained. Assumption 2) could be dropped, as if the Universe is not unchanging, one co ...
... most easily be dropped? Assumption 1) (homogeneity) has a considerable amount of observational evidence to back it up, and it would be pointless to regard assumption 4) as false, so these two assumptions should be retained. Assumption 2) could be dropped, as if the Universe is not unchanging, one co ...
Unit 2 Lesson 1
... What makes up the universe? • Earth is a special place because it has just the right combination of conditions to support life. • The presence of air and water supports the growth and development of plants and animals. • The atmosphere contains an ozone layer that absorbs harmful solar radiation and ...
... What makes up the universe? • Earth is a special place because it has just the right combination of conditions to support life. • The presence of air and water supports the growth and development of plants and animals. • The atmosphere contains an ozone layer that absorbs harmful solar radiation and ...
Chapter 34: Cosmology FYI 1. Radar Ranging 2. Triangulation idea
... Early ideas of the universe (steady state) held that it was: ...
... Early ideas of the universe (steady state) held that it was: ...
21structure1i
... There is no single method that can be used to find the distances to all objects We use many methods, each building on the other Called the cosmic distance ladder ...
... There is no single method that can be used to find the distances to all objects We use many methods, each building on the other Called the cosmic distance ladder ...
Word
... billion light years away, because light has only had 13.7 billion years to travel. However, why does our observable universe have an actual radius of about 46 billion light years? (Hint: Click the Observable Universe to aid your reasoning) ____________________________________________________________ ...
... billion light years away, because light has only had 13.7 billion years to travel. However, why does our observable universe have an actual radius of about 46 billion light years? (Hint: Click the Observable Universe to aid your reasoning) ____________________________________________________________ ...
The Early Universe and the Big Bang
... gravity waves from younger universe, but not yet • But we can explore earlier times by mentally “running expansion backwards” • Figure out what would have happened to cosmic photons and mass particles when universe was denser and cosmic photons had more energy – using known physics ...
... gravity waves from younger universe, but not yet • But we can explore earlier times by mentally “running expansion backwards” • Figure out what would have happened to cosmic photons and mass particles when universe was denser and cosmic photons had more energy – using known physics ...
ISP 205: Visions of the Universe
... • all galaxies outside our Local Group are moving away from us. • the more distant the galaxy, the faster it is ...
... • all galaxies outside our Local Group are moving away from us. • the more distant the galaxy, the faster it is ...
- hcstonline.org
... 7. It is sometimes said that we are all made of star dust. Using your understanding of stellar evolution, explain this statement. (A.3) 8. How do scientists estimate the number of stars in our galaxy? (A4) 9. How do scientists estimate the number of galaxies in the Universe? (A4) 10. Describe one pi ...
... 7. It is sometimes said that we are all made of star dust. Using your understanding of stellar evolution, explain this statement. (A.3) 8. How do scientists estimate the number of stars in our galaxy? (A4) 9. How do scientists estimate the number of galaxies in the Universe? (A4) 10. Describe one pi ...
AST1001.ch1
... • all galaxies outside our Local Group are moving away from us. • the more distant the galaxy, the faster it is ...
... • all galaxies outside our Local Group are moving away from us. • the more distant the galaxy, the faster it is ...
Cosmology
... C. Dust prevents us from seeing beyond a certain distance. D. There are so many galaxies in the universe that they block our view. ...
... C. Dust prevents us from seeing beyond a certain distance. D. There are so many galaxies in the universe that they block our view. ...
Paradigm Shifts in Cosmology
... force so that its effect on the expansion rate is only deceleration. In order to accelerate the expansion, a sort of repulsive force, namely, something that exerts anti-gravity is needed. What we can readily think of is Einstein s cosmological constant. The vacuum energy that caused inflation is al ...
... force so that its effect on the expansion rate is only deceleration. In order to accelerate the expansion, a sort of repulsive force, namely, something that exerts anti-gravity is needed. What we can readily think of is Einstein s cosmological constant. The vacuum energy that caused inflation is al ...
Theory of the Infinite Universe
... Stars provide vast amounts of energy for millions of years through the process of nuclear fusion. Nuclear fusion occurs when two elements are fused together to form a heavier element. This process r ...
... Stars provide vast amounts of energy for millions of years through the process of nuclear fusion. Nuclear fusion occurs when two elements are fused together to form a heavier element. This process r ...
A glance at the beginning of the Universe
... where n refers to the radial quantum number or principal quantum number of the electron. The transitions are named sequentially by Greek letter: n = 3 to n = 2 is called H-α, 4 to 2 is H-β. ...
... where n refers to the radial quantum number or principal quantum number of the electron. The transitions are named sequentially by Greek letter: n = 3 to n = 2 is called H-α, 4 to 2 is H-β. ...
AV_Paper1_TheAgeOfTheUniverse
... model as the standard model of cosmology. The presence of dark energy implies that the universe was expanding more slowly at around half its present age than today, which makes the universe older for a given value of the Hubble parameter. The precision of the more recent measurements from the Planck ...
... model as the standard model of cosmology. The presence of dark energy implies that the universe was expanding more slowly at around half its present age than today, which makes the universe older for a given value of the Hubble parameter. The precision of the more recent measurements from the Planck ...
powerpoint
... seems to be a “dark matter” in the Universe. If there is enough dark matter, the universe could be “closed,” i.e. it may someday stop expanding and start contracting. 2) Very careful studies of the velocities of galaxies should be able to reveal if the rate of expansion is slowing down. However, the ...
... seems to be a “dark matter” in the Universe. If there is enough dark matter, the universe could be “closed,” i.e. it may someday stop expanding and start contracting. 2) Very careful studies of the velocities of galaxies should be able to reveal if the rate of expansion is slowing down. However, the ...
Lecture24
... like fog However, if light is absorbed it will also re-radiate, producing light albeit at different wavelengths, so this doesn’t work! ...
... like fog However, if light is absorbed it will also re-radiate, producing light albeit at different wavelengths, so this doesn’t work! ...
class 1,S11
... • How did we come to be? —The matter in our bodies came from the Big Bang, which produced hydrogen and helium. —All other elements were constructed from H and He in stars and then recycled into new star systems, including our solar system. • How can we know what the universe was like in the past? • ...
... • How did we come to be? —The matter in our bodies came from the Big Bang, which produced hydrogen and helium. —All other elements were constructed from H and He in stars and then recycled into new star systems, including our solar system. • How can we know what the universe was like in the past? • ...
1.1 Fundamental Observers
... This is an ambitious goal for a species of primates on planet Earth, and you may well wonder whether it is indeed possible to know the whole Universe. As a matter of fact, humans have made huge strides in observational and theoretical cosmology over the last twenty-thirty years in particular. We can ...
... This is an ambitious goal for a species of primates on planet Earth, and you may well wonder whether it is indeed possible to know the whole Universe. As a matter of fact, humans have made huge strides in observational and theoretical cosmology over the last twenty-thirty years in particular. We can ...
class 1,F10
... • How did we come to be? —The matter in our bodies came from the Big Bang, which produced hydrogen and helium. —All other elements were constructed from H and He in stars and then recycled into new star systems, including our solar system. • How can we know what the universe was like in the past? • ...
... • How did we come to be? —The matter in our bodies came from the Big Bang, which produced hydrogen and helium. —All other elements were constructed from H and He in stars and then recycled into new star systems, including our solar system. • How can we know what the universe was like in the past? • ...
Distant galaxies and quasars The ages of things Light
... • Quasars (the most luminous Active Galactic Nuclei, or AGN) have evolved dramatically over cosmic time • Because they are easy to see to large distances, this (unlike galaxy evolution) has been clearly known for several decades • In the past they were both much more numerous and substantially more ...
... • Quasars (the most luminous Active Galactic Nuclei, or AGN) have evolved dramatically over cosmic time • Because they are easy to see to large distances, this (unlike galaxy evolution) has been clearly known for several decades • In the past they were both much more numerous and substantially more ...