Lecture20 - University of Waterloo
... At this distance, the light we are seeing was emitted when the Universe was only a third of its present age. ...
... At this distance, the light we are seeing was emitted when the Universe was only a third of its present age. ...
Lecture 24, PPT version
... • Cosmological redshift is technically not a Doppler shift (photons lose energy as they travel to us) • Energy density in light drops faster than energy density in mass due to redshift of the photons • Big Bang predictions • Olbers’ paradox (darkness at night) ...
... • Cosmological redshift is technically not a Doppler shift (photons lose energy as they travel to us) • Energy density in light drops faster than energy density in mass due to redshift of the photons • Big Bang predictions • Olbers’ paradox (darkness at night) ...
What MSU Astronomers Will Do with the SOAR
... • Recently formed test details of “bottom-up” formation scenario • Evolution of cluster population sensitive probe of Dark Matter and Dark Energy • Best “fair sample” of matter content of Universe • Dark vs. normal matter ...
... • Recently formed test details of “bottom-up” formation scenario • Evolution of cluster population sensitive probe of Dark Matter and Dark Energy • Best “fair sample” of matter content of Universe • Dark vs. normal matter ...
Course Expectations
... 9. The difference between active and inactive galaxies 10. Hubble’s Law is used to calculate the distance to other galaxies 11. The farther away the galaxy is the faster it is moving 12. The Big Bang Theory is currently the most widely accepted and supported explanation for the formation of our univ ...
... 9. The difference between active and inactive galaxies 10. Hubble’s Law is used to calculate the distance to other galaxies 11. The farther away the galaxy is the faster it is moving 12. The Big Bang Theory is currently the most widely accepted and supported explanation for the formation of our univ ...
Chapter 14 Origins
... The first few decades of the twentieth century brought huge changes to our model of the universe. Construct a small table listing the names of the most important researchers involved (you should be able to include at least five) and a brief summary of their contribution. ...
... The first few decades of the twentieth century brought huge changes to our model of the universe. Construct a small table listing the names of the most important researchers involved (you should be able to include at least five) and a brief summary of their contribution. ...
ASTRONOMY 1303 Syllabus Fall 2015
... Astronomy is the oldest science. For centuries humans have looked up at the sky and wondered about their place in the universe. Today we are in the midst of an explosion of knowledge regarding our place in the universe. New technology has revolutionized the way astronomers “see” the universe. The ai ...
... Astronomy is the oldest science. For centuries humans have looked up at the sky and wondered about their place in the universe. Today we are in the midst of an explosion of knowledge regarding our place in the universe. New technology has revolutionized the way astronomers “see” the universe. The ai ...
Instrumentation for Cosmology
... Just strings of stars? No, because they would be tightly wound up. Suppose the age of the galaxy is 10 billion years. Its inner regions rotate once in 200 million years… Therefore, we’d expect about 50 turns. The galaxy would look like a clock spring. ...
... Just strings of stars? No, because they would be tightly wound up. Suppose the age of the galaxy is 10 billion years. Its inner regions rotate once in 200 million years… Therefore, we’d expect about 50 turns. The galaxy would look like a clock spring. ...
Image Credit - Northwestern University
... • Independent of the direction they pointed the telescope. • Corresponded to an “antenna temperature” of 3.5 K • Not due to atmosphere (would be ...
... • Independent of the direction they pointed the telescope. • Corresponded to an “antenna temperature” of 3.5 K • Not due to atmosphere (would be ...
Chapter 8, Lesson 5, pdf
... • Classify galaxies according to their properties. • Explain the big bang and the way in which Earth and its atmosphere were formed. ...
... • Classify galaxies according to their properties. • Explain the big bang and the way in which Earth and its atmosphere were formed. ...
Stars - Robert M. Hazen
... Structure of the Universe • The Local Group – Milky way, Andromeda galaxy, and ~50 others ...
... Structure of the Universe • The Local Group – Milky way, Andromeda galaxy, and ~50 others ...
File
... Big Bang Theory •Big Bang Theory – the universe formed from a massive expansion approximately 14 bya The Universe is expanding and the visible edge is about 13.7 billion light years away ...
... Big Bang Theory •Big Bang Theory – the universe formed from a massive expansion approximately 14 bya The Universe is expanding and the visible edge is about 13.7 billion light years away ...
Chapter 20 The Universe
... Galaxy- large grouping of stars -our solar system is part of Milky Way Galaxy - what we see as the Milky Way is only the edge (spiral galaxy) ...
... Galaxy- large grouping of stars -our solar system is part of Milky Way Galaxy - what we see as the Milky Way is only the edge (spiral galaxy) ...
ch16 b - Manasquan Public Schools
... together out of a cloud of dust and gas --Inner planets formed from rocks and dust, and the gas giants formed from gases ...
... together out of a cloud of dust and gas --Inner planets formed from rocks and dust, and the gas giants formed from gases ...
OGT TYPE QUESTIONS
... Answer: C Some communities have a hard time providing enough fresh water for everybody, but because fresh water is constantly recycled in the environment through the water cycle, freshwater can still be considered a renewable resource. The other resources listed will someday run out if we keep using ...
... Answer: C Some communities have a hard time providing enough fresh water for everybody, but because fresh water is constantly recycled in the environment through the water cycle, freshwater can still be considered a renewable resource. The other resources listed will someday run out if we keep using ...
Scientific Results Summary
... The materials revealed striking similarities between two different families of comets (Periodic versus Oort Cloud) where none was thought to occur, mostly where the comets originally formed. While we’re discussing events within the Solar System, scientists using data from Subaru showed that the size ...
... The materials revealed striking similarities between two different families of comets (Periodic versus Oort Cloud) where none was thought to occur, mostly where the comets originally formed. While we’re discussing events within the Solar System, scientists using data from Subaru showed that the size ...
8Sept103_2014
... How do they age? How and why do they die? This process is called Stellar Evolution! ...
... How do they age? How and why do they die? This process is called Stellar Evolution! ...
Integrative Studies 410 Our Place in the Universe
... – Using a ruler marked in mm, we round to the nearest marking – at most off by half a division, or 0.5 mm – Cite a measurement of 15 mm as 15 0.5 mm to indicate that the real value of the length is likely to be anywhere between ...
... – Using a ruler marked in mm, we round to the nearest marking – at most off by half a division, or 0.5 mm – Cite a measurement of 15 mm as 15 0.5 mm to indicate that the real value of the length is likely to be anywhere between ...
Unit 3 - Section 9.7 2011 Universe Origin
... shifting is known as a Doppler shift. By measuring the shift in wavelength, the speed of movement away (red) or towards (blue) Earth can be calculated. When a galaxy is rotating, the starlight from stars on the side of the galaxy that is moving towards are blue-shifted (…think opposite of Red Shift) ...
... shifting is known as a Doppler shift. By measuring the shift in wavelength, the speed of movement away (red) or towards (blue) Earth can be calculated. When a galaxy is rotating, the starlight from stars on the side of the galaxy that is moving towards are blue-shifted (…think opposite of Red Shift) ...
Astro twopages
... The Sun is 8 light minutes away. If the Sun suddenly stopped producing energy, it will still take 8 minutes for the Earth to know it. Incidentally the sun is about 1 light second in radius as well. Pluto is the edge of the planets we accept in the solar system. It would take 4.5 hours for light to r ...
... The Sun is 8 light minutes away. If the Sun suddenly stopped producing energy, it will still take 8 minutes for the Earth to know it. Incidentally the sun is about 1 light second in radius as well. Pluto is the edge of the planets we accept in the solar system. It would take 4.5 hours for light to r ...
Practice Questions for Final
... C. During the first 0.001 second after the Big Bang, particles and antiparticles were made in almost but not perfectly equal numbers. Everything annihilated except the very slight excess of matter particles. D. GUT theories predict that under the conditions that prevailed in the early universe, the ...
... C. During the first 0.001 second after the Big Bang, particles and antiparticles were made in almost but not perfectly equal numbers. Everything annihilated except the very slight excess of matter particles. D. GUT theories predict that under the conditions that prevailed in the early universe, the ...
Miss Nevoral - Ms. Nevoral`s site
... Section 10.1 – Explaining the Early Universe (pages 346 – 355) 1. Define astronomers: People who study space and objects in space. 2. Explain why scientific theories are not considered the final truth/fact about something. Theories are developed with existing information. The main ideas about a theo ...
... Section 10.1 – Explaining the Early Universe (pages 346 – 355) 1. Define astronomers: People who study space and objects in space. 2. Explain why scientific theories are not considered the final truth/fact about something. Theories are developed with existing information. The main ideas about a theo ...
Galaxies and Stars
... Galaxy – a large system of stars held together by the same gravitational pull and separated from other large systems. ...
... Galaxy – a large system of stars held together by the same gravitational pull and separated from other large systems. ...
Observable universe
The observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth at the present time because light and other signals from these objects has had time to reach the Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth.The word observable used in this sense does not depend on whether modern technology actually permits detection of radiation from an object in this region (or indeed on whether there is any radiation to detect). It simply indicates that it is possible in principle for light or other signals from the object to reach an observer on Earth. In practice, we can see light only from as far back as the time of photon decoupling in the recombination epoch. That is when particles were first able to emit photons that were not quickly re-absorbed by other particles. Before then, the Universe was filled with a plasma that was opaque to photons.The surface of last scattering is the collection of points in space at the exact distance that photons from the time of photon decoupling just reach us today. These are the photons we detect today as cosmic microwave background radiation (CMBR). However, with future technology, it may be possible to observe the still older relic neutrino background, or even more distant events via gravitational waves (which also should move at the speed of light). Sometimes astrophysicists distinguish between the visible universe, which includes only signals emitted since recombination—and the observable universe, which includes signals since the beginning of the cosmological expansion (the Big Bang in traditional cosmology, the end of the inflationary epoch in modern cosmology). According to calculations, the comoving distance (current proper distance) to particles from the CMBR, which represent the radius of the visible universe, is about 14.0 billion parsecs (about 45.7 billion light years), while the comoving distance to the edge of the observable universe is about 14.3 billion parsecs (about 46.6 billion light years), about 2% larger.The best estimate of the age of the universe as of 2015 is 7010137990000000000♠13.799±0.021 billion years but due to the expansion of space humans are observing objects that were originally much closer but are now considerably farther away (as defined in terms of cosmological proper distance, which is equal to the comoving distance at the present time) than a static 13.8 billion light-years distance. It is estimated that the diameter of the observable universe is about 28 gigaparsecs (91 billion light-years, 8.8×1026 metres or 5.5×1023 miles), putting the edge of the observable universe at about 46–47 billion light-years away.