Where do we come from?
... If the universe had remained dense, it wouldn’t have cooled enough for nuclei, atoms, galaxies, and us to form. (Speaking to an audience of humans, I make no apologies for my human chauvinism.) ...
... If the universe had remained dense, it wouldn’t have cooled enough for nuclei, atoms, galaxies, and us to form. (Speaking to an audience of humans, I make no apologies for my human chauvinism.) ...
Solutions - UC Berkeley Astronomy w
... Supernovae are used as standard candles to measure distances to distant galaxies. This is then compared to the redshift of these galaxies, which provides their velocities. By comparing changes in the velocities at different distances (which corresponds to different times) we can infer whether there ...
... Supernovae are used as standard candles to measure distances to distant galaxies. This is then compared to the redshift of these galaxies, which provides their velocities. By comparing changes in the velocities at different distances (which corresponds to different times) we can infer whether there ...
Cosmo: Student`s Workbook
... Monthly and yearly motion of the stars and planets was observed but this was due to the motion of the Earth and planets around the Sun. The stars appeared to move as the Earth moved around the Sun but their positions relative to each other did not change. The spectra of a star was also a clue as to ...
... Monthly and yearly motion of the stars and planets was observed but this was due to the motion of the Earth and planets around the Sun. The stars appeared to move as the Earth moved around the Sun but their positions relative to each other did not change. The spectra of a star was also a clue as to ...
Lecture24
... Olbers postulated that the Universe was filled with an absorbing medium, like fog However, if light is absorbed it will also re-radiate, producing light albeit at different wavelengths, so this doesn’t work! ...
... Olbers postulated that the Universe was filled with an absorbing medium, like fog However, if light is absorbed it will also re-radiate, producing light albeit at different wavelengths, so this doesn’t work! ...
Astronomy
... 10-15 billion years old (Earth is 4.6 billion years old) Where do we think the universe came from/how did it form? ...
... 10-15 billion years old (Earth is 4.6 billion years old) Where do we think the universe came from/how did it form? ...
AGN-Hubble
... Their separation only increases because the amount of space between them increases. The scale of the Universe increases, but not the scale of particles, galaxies, or even clusters (anything bound). The expansion is only apparent on scales of millions of light years. ...
... Their separation only increases because the amount of space between them increases. The scale of the Universe increases, but not the scale of particles, galaxies, or even clusters (anything bound). The expansion is only apparent on scales of millions of light years. ...
04 Astrophysics_-_lesson_4 cosmology
... origin and evolution of our universe. It postulates that 12 to 14 billion years ago, the portion of the universe we can see today was only a few millimetres across. It has since expanded from this hot dense state into the vast and much cooler cosmos we currently inhabit. We can see remnants of this ...
... origin and evolution of our universe. It postulates that 12 to 14 billion years ago, the portion of the universe we can see today was only a few millimetres across. It has since expanded from this hot dense state into the vast and much cooler cosmos we currently inhabit. We can see remnants of this ...
Which of the following is the best description of an Sc galaxy? A) a
... A) 1 billion years B) 10 billion years C) 100 billion years D) 1000 billion years If the universe is dominated by dark energy, then the rate of expansion of the universe is A) slowing down B) accelerating C) exactly constant with time D) zero, the universe is neither expanding or contracting Most of ...
... A) 1 billion years B) 10 billion years C) 100 billion years D) 1000 billion years If the universe is dominated by dark energy, then the rate of expansion of the universe is A) slowing down B) accelerating C) exactly constant with time D) zero, the universe is neither expanding or contracting Most of ...
The Sun and Beyond - Valhalla High School
... Our universe is 25 billion light years in diameter and 13-15 billion years old closest star to us is Proxima Centauri- 4.22 light years away ...
... Our universe is 25 billion light years in diameter and 13-15 billion years old closest star to us is Proxima Centauri- 4.22 light years away ...
Mass Outflow in the Seyfert 1 Galaxy NGC 4151
... Quantum Universe • “flatness” – why a flat Universe (note, we are within a factor of 10 of critical density) • “horizon problem” – isotropy of CMB (same to 1 part in 1000) At time of recombination, gas was transparent to radiation – but… not enough time for signals to travel from one region to anot ...
... Quantum Universe • “flatness” – why a flat Universe (note, we are within a factor of 10 of critical density) • “horizon problem” – isotropy of CMB (same to 1 part in 1000) At time of recombination, gas was transparent to radiation – but… not enough time for signals to travel from one region to anot ...
The Universe Starring Man? The Impact of Scientific
... Not only do we occupy an insignificant part of the universe Not only have we been around for an entirely insignificant amount of time [Universe began 13.8 billion years ago Earth came into existence 4.6 billion years ago First life 3.8 billion years ago Homo sapiens emerged only 200thousand years ag ...
... Not only do we occupy an insignificant part of the universe Not only have we been around for an entirely insignificant amount of time [Universe began 13.8 billion years ago Earth came into existence 4.6 billion years ago First life 3.8 billion years ago Homo sapiens emerged only 200thousand years ag ...
Document
... condition and it was continuously expanding, even today. But the universe is getting cooler as well, scientists believe that universe was approximately 13.8 billion years ago. Scientists base the Big Bang theory on many different observations. The most important is the red shift of very far away gal ...
... condition and it was continuously expanding, even today. But the universe is getting cooler as well, scientists believe that universe was approximately 13.8 billion years ago. Scientists base the Big Bang theory on many different observations. The most important is the red shift of very far away gal ...
Universe Standards - Harvard
... 9–12 STANDARD II: THE PHYSICAL SETTING B. Stated Concept: “On the basis of scientific evidence, the universe is estimated to be over ten billion years old. The current theory is that its entire contents expanded explosively from a hot, dense, chaotic mass. Stars condensed by gravity out of clouds of ...
... 9–12 STANDARD II: THE PHYSICAL SETTING B. Stated Concept: “On the basis of scientific evidence, the universe is estimated to be over ten billion years old. The current theory is that its entire contents expanded explosively from a hot, dense, chaotic mass. Stars condensed by gravity out of clouds of ...
Galaxy Zoo: Pre and post‐workshop information
... The most accurate value for the Hubble constant has been determined using a different technique to Hubble. A satellite called the Wilkinson Microwave Anisotropy Probe (WMAP) has been measuring temperature fluctuations as small as 0.0002 K in the left‐over radiation from the Big Bang (called the cosmic ...
... The most accurate value for the Hubble constant has been determined using a different technique to Hubble. A satellite called the Wilkinson Microwave Anisotropy Probe (WMAP) has been measuring temperature fluctuations as small as 0.0002 K in the left‐over radiation from the Big Bang (called the cosmic ...
Document
... as a framework for how that history made our existence possible. So first we need to know something of the structure and arrangement of this universe whose history we want to describe. Theme - Gaining perspective on how we connect to the universe: we are products of the whole universe, not just our ...
... as a framework for how that history made our existence possible. So first we need to know something of the structure and arrangement of this universe whose history we want to describe. Theme - Gaining perspective on how we connect to the universe: we are products of the whole universe, not just our ...
Paradigm Shifts in Cosmology
... expanding dynamic nature of the universe was found. Here, Vesto Slipher should be mentioned. From the 1910 s to the 1920 s he made spectroscopic observations of the spiral nebulae (galaxies) and found that almost all the galaxies showed the shift of spectral lines toward the red side of the spectrum ...
... expanding dynamic nature of the universe was found. Here, Vesto Slipher should be mentioned. From the 1910 s to the 1920 s he made spectroscopic observations of the spiral nebulae (galaxies) and found that almost all the galaxies showed the shift of spectral lines toward the red side of the spectrum ...
Expansion of the Universe
... 1. Scattering of blue and green light - i.e. why the sky appears blue, and why some sunrises or sunsets may appear red. Dust, smoke from forest fires, or other intervening material between the source and the observer can scatter (remove) the higher frequency colors (blue, green, yellow, and orange) ...
... 1. Scattering of blue and green light - i.e. why the sky appears blue, and why some sunrises or sunsets may appear red. Dust, smoke from forest fires, or other intervening material between the source and the observer can scatter (remove) the higher frequency colors (blue, green, yellow, and orange) ...
Word - Sam Davyson
... between the stars and us. This idea can be mimicked in the laboratory with a light box, a lux meter and a measuring rule. Taking measurements and plotting them reveals a linear relationship between light intensity and the reciprocal of the distance squared. It turns out that they are in fact proport ...
... between the stars and us. This idea can be mimicked in the laboratory with a light box, a lux meter and a measuring rule. Taking measurements and plotting them reveals a linear relationship between light intensity and the reciprocal of the distance squared. It turns out that they are in fact proport ...
Hubblecast Episode 68: The Hubble time machine Visual notes 00
... 7. Nowhere is this seen better than in the Hubble Deep Field images. To create these images Hubble gazed at the same patches of sky for very long periods of time, gathering enough light to see extremely faint and very far away objects. These images show some of the most distant galaxies that have ev ...
... 7. Nowhere is this seen better than in the Hubble Deep Field images. To create these images Hubble gazed at the same patches of sky for very long periods of time, gathering enough light to see extremely faint and very far away objects. These images show some of the most distant galaxies that have ev ...
The Runaway Universe - Astronomy & Astrophysics Group
... scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates about it. The galaxy is, in fact, nothing but a collection of innumerable stars grouped together in clusters ...
... scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates about it. The galaxy is, in fact, nothing but a collection of innumerable stars grouped together in clusters ...
Galaxies and the Big Bang Theory
... A ___________ is a huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity The three different types of galaxies that exist in our universe are: ...
... A ___________ is a huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity The three different types of galaxies that exist in our universe are: ...
Ch. 21 notes-1
... Raisin bread analogy The Big Bang Theory According to the big bang theory, the universe formed in an enormous explosion about 10 to 15 billion years ago. Since the big bang, the universe is billions of times larger than it was billions of years ago. Astronomers have concluded that the galaxies ar ...
... Raisin bread analogy The Big Bang Theory According to the big bang theory, the universe formed in an enormous explosion about 10 to 15 billion years ago. Since the big bang, the universe is billions of times larger than it was billions of years ago. Astronomers have concluded that the galaxies ar ...
understanding-the
... a. The red shift indicates that distant galaxies are moving away from each other. b. The red shift indicates that distant galaxies are moving towards each other. c. The blue shift indicates that distant galaxies are moving away from each other. d. The blue shift indicates that distant galaxies are m ...
... a. The red shift indicates that distant galaxies are moving away from each other. b. The red shift indicates that distant galaxies are moving towards each other. c. The blue shift indicates that distant galaxies are moving away from each other. d. The blue shift indicates that distant galaxies are m ...
Quiz Maker - Geneva 304
... Review Questions: (Give answers in your own words) A Sense of the Universe 1. What was the universe like for ancient/medieval astronomers? 2. How did Astronomy relate to religious beliefs? 3. Why has the understandings and discoveries in the field of Astronomy increased so much over the last 30 year ...
... Review Questions: (Give answers in your own words) A Sense of the Universe 1. What was the universe like for ancient/medieval astronomers? 2. How did Astronomy relate to religious beliefs? 3. Why has the understandings and discoveries in the field of Astronomy increased so much over the last 30 year ...
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 ...
Universe
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.