Big Bang and Beyond
... • If the energy level of the new nucleus is very different from one of its natural energy state, the new nucleus is unstable and will decompose (radio-activity): ...
... • If the energy level of the new nucleus is very different from one of its natural energy state, the new nucleus is unstable and will decompose (radio-activity): ...
EXERCISES: Set 4 of 4 Q1: (You will need a ruler and a calculator
... Note: Q8 is at an advanced level. However, try your best: even partial attempts will be useful ahead of the supervision. Q8(a): Give the definition and the physical interpretation of the power spectrum P (k) and of the correlation function ξ(r) of the density fluctuation field δ. Q8(b): Write an ex ...
... Note: Q8 is at an advanced level. However, try your best: even partial attempts will be useful ahead of the supervision. Q8(a): Give the definition and the physical interpretation of the power spectrum P (k) and of the correlation function ξ(r) of the density fluctuation field δ. Q8(b): Write an ex ...
Albert Einstein
... Way – another “island universe” : galaxy! Edwin Hubble in 1924 identified Cepheids in Andromeda (M33) showed they were far outside of Milky Way! His first big discovery. Next was expansion of the universe – wow! Hubble using new 100” Hooker telescope at Mt. Wilson (above LA) ...
... Way – another “island universe” : galaxy! Edwin Hubble in 1924 identified Cepheids in Andromeda (M33) showed they were far outside of Milky Way! His first big discovery. Next was expansion of the universe – wow! Hubble using new 100” Hooker telescope at Mt. Wilson (above LA) ...
Big bang, red shift and doppler effect
... The fact that light from a distant galaxy seems to move towards the red end of galaxies are shrinking the spectrum gives scientists evidence that ...
... The fact that light from a distant galaxy seems to move towards the red end of galaxies are shrinking the spectrum gives scientists evidence that ...
BIG BANG BALLOONS
... Introduction: In the 1920s, astronomer Edwin Hubble realized that light coming from galaxies is shifted into the longer, red wavelengths. This would indicate that they are moving away from Earth. By carefully observing the light from galaxies at different distances from Earth, he determined that the ...
... Introduction: In the 1920s, astronomer Edwin Hubble realized that light coming from galaxies is shifted into the longer, red wavelengths. This would indicate that they are moving away from Earth. By carefully observing the light from galaxies at different distances from Earth, he determined that the ...
PowerPoint - Physics and Astronomy
... as it was when the universe was 1 billion years old. as it will be 1 billion years from now. as it was 1 billion years ago. as it is today, but redshifted 10 percent of the speed of light. e) as it was just after the Big Bang. Explanation: ...
... as it was when the universe was 1 billion years old. as it will be 1 billion years from now. as it was 1 billion years ago. as it is today, but redshifted 10 percent of the speed of light. e) as it was just after the Big Bang. Explanation: ...
Astronomy 110G Review Sheet for Exam #3 The
... showed conclusively that they were extragalactic objects? (The last is the most important part.) How does one determine the mass of a galaxy? (There are several possible ways). How do these determinations give rise to the belief that some galaxies (including our own) contain “dark” matter? Much of t ...
... showed conclusively that they were extragalactic objects? (The last is the most important part.) How does one determine the mass of a galaxy? (There are several possible ways). How do these determinations give rise to the belief that some galaxies (including our own) contain “dark” matter? Much of t ...
There are billions of galaxies, many containing
... condensation of huge clouds of hydrogen, with particularly dense regions being compressed by gravity until stars were formed. At the present time, the universe is dominated by the fusion of hydrogen to form helium in the cores of mature stars. Its structure seems stable, just as individual stars are ...
... condensation of huge clouds of hydrogen, with particularly dense regions being compressed by gravity until stars were formed. At the present time, the universe is dominated by the fusion of hydrogen to form helium in the cores of mature stars. Its structure seems stable, just as individual stars are ...
AST 207 Final Exam, Answers 15 December 2010
... b. (2 pts.) Find the period of the orbit of planet U. Kepler’s 3rd Law. P2=R3/M P=1year/(3e6)1/2 =0.58e-4year=5hour. 5. You are transported back in time to when the universe was 13 million years old and the expansion parameter was 1/100. a. (3 pts.) What was the temperature of the radiation from the ...
... b. (2 pts.) Find the period of the orbit of planet U. Kepler’s 3rd Law. P2=R3/M P=1year/(3e6)1/2 =0.58e-4year=5hour. 5. You are transported back in time to when the universe was 13 million years old and the expansion parameter was 1/100. a. (3 pts.) What was the temperature of the radiation from the ...
Phys 214. Planets and Life
... could be many worlds that had plenty of time for life to arise and evolve. These worlds might have had civilizations millions or billions of years ago. The scale of time holds sobering lessons for our own future. Species have come and gone in the months of the cosmic calendar, and there is no reason ...
... could be many worlds that had plenty of time for life to arise and evolve. These worlds might have had civilizations millions or billions of years ago. The scale of time holds sobering lessons for our own future. Species have come and gone in the months of the cosmic calendar, and there is no reason ...
Outline - Picnic Point High School
... The Universe began with a singularity in space-time. After the initial explosion, the Universe started to expand, cool and condense, forming matter. As part of this ongoing process the Sun and the Solar System were formed over 4x109 years ago from a gas cloud which resulted from a supernova explosio ...
... The Universe began with a singularity in space-time. After the initial explosion, the Universe started to expand, cool and condense, forming matter. As part of this ongoing process the Sun and the Solar System were formed over 4x109 years ago from a gas cloud which resulted from a supernova explosio ...
AST 101 INTRODUCTION TO ASTRONOMY SPRING 2008
... formed at the same time; the particle pair would then annihilate each other. D. For every particle created there was also an antiparticle created of the same mass. E. As the temperature of the Universe dropped, the particle creation rate slowed. D 31. ...
... formed at the same time; the particle pair would then annihilate each other. D. For every particle created there was also an antiparticle created of the same mass. E. As the temperature of the Universe dropped, the particle creation rate slowed. D 31. ...
Version0 Answers
... answers the question or completes the thought and fill in the corresponding area on the computer graded sheets with a number 2 lead pencil. E 1. Early in the Big Bang when temperatures are extremely high, particles can be created out of the radiation field. Which of the following statements about the ...
... answers the question or completes the thought and fill in the corresponding area on the computer graded sheets with a number 2 lead pencil. E 1. Early in the Big Bang when temperatures are extremely high, particles can be created out of the radiation field. Which of the following statements about the ...
QUASARS and ACTIVE GALAXIES
... We now understand the power source: rapidly rotating supermassive black holes (SMBHs) (very efficient energy producers) in the central cores of galaxies More recently, we have been able to show that some quasars are indeed embedded in faint fuzzy patches (the host galaxies); and there is considerabl ...
... We now understand the power source: rapidly rotating supermassive black holes (SMBHs) (very efficient energy producers) in the central cores of galaxies More recently, we have been able to show that some quasars are indeed embedded in faint fuzzy patches (the host galaxies); and there is considerabl ...
Test 2 - Physics@Brock
... 39. The cosmic background radiation currently has its peak in the electromagnetic spectrum. ...
... 39. The cosmic background radiation currently has its peak in the electromagnetic spectrum. ...
Slide 1
... These mesurements indicate that the Universe is expanding faster now than when the supernovae exploded as the light has had to travel further to reach us than expected by a constant rate of expansion (assummed to be the case with Hubble’s Law). These and further measurements have led astronomers to ...
... These mesurements indicate that the Universe is expanding faster now than when the supernovae exploded as the light has had to travel further to reach us than expected by a constant rate of expansion (assummed to be the case with Hubble’s Law). These and further measurements have led astronomers to ...
Hubble Redshift - at www.arxiv.org.
... vityaev@math.nsc.ru Recent measurements of Hubble redshift from supernovae are inconsistent with the standard theoretical model of an expanding Friedmann universe. Figure 1 shows the Hubble redshift for 37 supernovae measured by Riess et al.1 illustrating that a positive cosmological constant must b ...
... vityaev@math.nsc.ru Recent measurements of Hubble redshift from supernovae are inconsistent with the standard theoretical model of an expanding Friedmann universe. Figure 1 shows the Hubble redshift for 37 supernovae measured by Riess et al.1 illustrating that a positive cosmological constant must b ...
Search For Dark Matters Essay Research Paper
... But one might ask, what is dark matter ? What is it consisting of? And, how do we know that its there? As much as 90 percent of the matter in the universe is invisible. Detecting this dark matter will help astronomers better comprehend the universe\’s destiny. Eighty-four years after Albert Einstein ...
... But one might ask, what is dark matter ? What is it consisting of? And, how do we know that its there? As much as 90 percent of the matter in the universe is invisible. Detecting this dark matter will help astronomers better comprehend the universe\’s destiny. Eighty-four years after Albert Einstein ...
Class 28 (Jun 2) - Physics at Oregon State University
... • Thanks to the Hubble Law, we can estimate the age of the universe. • At some point in the distant past, matter in the universe must have been densely packed. • From this point, the universe would have expanded at some high speed to become today’s universe. • Assuming a constant expansion over time ...
... • Thanks to the Hubble Law, we can estimate the age of the universe. • At some point in the distant past, matter in the universe must have been densely packed. • From this point, the universe would have expanded at some high speed to become today’s universe. • Assuming a constant expansion over time ...
Scale of the universe Table 1
... through its gravitational lensing of the Abell 222/223 supercluster) 1.5 x 1044 kg Local Supercluster (includes Milky Way galaxy) ...
... through its gravitational lensing of the Abell 222/223 supercluster) 1.5 x 1044 kg Local Supercluster (includes Milky Way galaxy) ...
Dark Energy
... Puzzle #3: what’s the underlying physics? Understanding the nature of the Dark Energy is arguably the most profound outstanding problem in contemporary physics. Are the properties of the Universe we see the result of some ...
... Puzzle #3: what’s the underlying physics? Understanding the nature of the Dark Energy is arguably the most profound outstanding problem in contemporary physics. Are the properties of the Universe we see the result of some ...
2 Big Bang - Net Texts
... it became less dense and began to cool. After only a few seconds, protons, neutrons, and electrons could form. After a few minutes, those subatomic particles came together to create hydrogen. Energy in the universe was great enough to initiate nuclear fusion, and hydrogen nuclei were fused into heli ...
... it became less dense and began to cool. After only a few seconds, protons, neutrons, and electrons could form. After a few minutes, those subatomic particles came together to create hydrogen. Energy in the universe was great enough to initiate nuclear fusion, and hydrogen nuclei were fused into heli ...
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.