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Chapter 31 - The Galaxy & Universe
... A. Like other galaxies, but these are strong radio emitters. ...
... A. Like other galaxies, but these are strong radio emitters. ...
CHAPTER 29 STARS 240 points
... 5. study of the universe, its nature, origin, and evolution 7. spinning neutron star that pulsates a pattern of light 8. an explosion that blows away the outer portion of a star fusing together the heavier elements 9. probe launched by NASA to map cosmic background radiation 10. massive star that fu ...
... 5. study of the universe, its nature, origin, and evolution 7. spinning neutron star that pulsates a pattern of light 8. an explosion that blows away the outer portion of a star fusing together the heavier elements 9. probe launched by NASA to map cosmic background radiation 10. massive star that fu ...
ASTR 1120-001 Final Examination Phil Armitage, Bruce Ferguson
... (a) X-ray emitting gas that is cooler, and galaxy velocities that are lower, than expected if there were no dark matter (b) X-ray emitting gas that is hotter, and galaxy velocities that are higher, than expected if there were no dark matter (c) X-ray emitting gas that is cooler, and galaxy velocitie ...
... (a) X-ray emitting gas that is cooler, and galaxy velocities that are lower, than expected if there were no dark matter (b) X-ray emitting gas that is hotter, and galaxy velocities that are higher, than expected if there were no dark matter (c) X-ray emitting gas that is cooler, and galaxy velocitie ...
Our Universe - E Natural Health Center
... According to the big-bang model, the universe expanded rapidly from a highly compressed primordial state, which resulted in a significant decrease in density and temperature. Soon afterward, the dominance of matter over antimatter (as observed today) may have been established by processes that also ...
... According to the big-bang model, the universe expanded rapidly from a highly compressed primordial state, which resulted in a significant decrease in density and temperature. Soon afterward, the dominance of matter over antimatter (as observed today) may have been established by processes that also ...
Chapter 12 Our Place in the Universe
... radiation. The brightness of a light source is proportional to 1/distance2. This means that if the distance to a light source is doubled the brightness will fall to a quarter of its original value. So, brighter stars are nearer, dimmer stars are further, right? Wrong. This only works if all stars ar ...
... radiation. The brightness of a light source is proportional to 1/distance2. This means that if the distance to a light source is doubled the brightness will fall to a quarter of its original value. So, brighter stars are nearer, dimmer stars are further, right? Wrong. This only works if all stars ar ...
Passport to the Universe Educator`s Guide Text
... the Earth and the other planets in the larger scheme of things. From out here, the sizes of and distances between the Earth, Sun, and other planets appear relatively small. On our trip, we pass three of the eight planets—Mars, Jupiter (and its moons, Io and Europa), and Saturn. We now head out for ...
... the Earth and the other planets in the larger scheme of things. From out here, the sizes of and distances between the Earth, Sun, and other planets appear relatively small. On our trip, we pass three of the eight planets—Mars, Jupiter (and its moons, Io and Europa), and Saturn. We now head out for ...
Our Place in the Universe (Chapter 1) The Structure and Size of the
... The Sun is a star. The Moon only reflects light from the Sun, so it is not a star. Stars are large balls of hot gas, mostly hydrogen and helium The Sun generates heat and light by a process called nuclear fusion This is different from what happens in nuclear power stations ...
... The Sun is a star. The Moon only reflects light from the Sun, so it is not a star. Stars are large balls of hot gas, mostly hydrogen and helium The Sun generates heat and light by a process called nuclear fusion This is different from what happens in nuclear power stations ...
Powerpoint
... • Distance from the Sun to Pluto – 0.006 light years = 6 x 109 km • Diameter of the Sun – 7 x 105 km • You could fit 108 Suns in the distance between the Sun and its closest neighbour • There is a lot of empty space between stars (or between stellar systems) in galaxies ...
... • Distance from the Sun to Pluto – 0.006 light years = 6 x 109 km • Diameter of the Sun – 7 x 105 km • You could fit 108 Suns in the distance between the Sun and its closest neighbour • There is a lot of empty space between stars (or between stellar systems) in galaxies ...
Lecture Thirteen (Powerpoint format) - Flash
... surprising properties of the early universe -- including, Why is the microwave background so uniform? Why are strange particles predicted to exist by some cosmological theories absent or at ...
... surprising properties of the early universe -- including, Why is the microwave background so uniform? Why are strange particles predicted to exist by some cosmological theories absent or at ...
chapter 13 cosmology
... too eventually led to large disagreements with observations. There were no other significant advances until the 16th Century, when Nicholas Kopernik (Copernicus), a polish prelate and scholar, made observations of planetary positions and developed a mathematical model for the heliocentric theory. He ...
... too eventually led to large disagreements with observations. There were no other significant advances until the 16th Century, when Nicholas Kopernik (Copernicus), a polish prelate and scholar, made observations of planetary positions and developed a mathematical model for the heliocentric theory. He ...
Cosmology, galaxies, stars and the sun
... The Nebular Theory states that gaseous clouds—nebulae(most likely the remnants of a massive supernova), slowly rotate, gradually collapse and flatten due to gravity and eventually form stars and planets. ...
... The Nebular Theory states that gaseous clouds—nebulae(most likely the remnants of a massive supernova), slowly rotate, gradually collapse and flatten due to gravity and eventually form stars and planets. ...
Revision Guide (Unit 2 Module 5) - Pearson Schools and FE Colleges
... Hubble also had to measure the distances of the galaxies he observed. He did this by observing the brightness of a standard type of star, the Cepheid variables. He found that a graph of speed against distance was a straight line through the origin. This indicated that the speed of recession is propo ...
... Hubble also had to measure the distances of the galaxies he observed. He did this by observing the brightness of a standard type of star, the Cepheid variables. He found that a graph of speed against distance was a straight line through the origin. This indicated that the speed of recession is propo ...
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. ...
Lecture5 - Tufts Institute of Cosmology
... • “Spiral Nebulae” are outside our Galaxy • “Spiral Nebulae” are systems of stars, i.e., other galaxies • Slipher’s spectroscopic measurements high radial velocities • Showed photos of spiral nebulae – with absorbing bands ...
... • “Spiral Nebulae” are outside our Galaxy • “Spiral Nebulae” are systems of stars, i.e., other galaxies • Slipher’s spectroscopic measurements high radial velocities • Showed photos of spiral nebulae – with absorbing bands ...
Gravity - Indiana University Astronomy
... a) The temperature of the gas when atoms formed from free electrons and nuclei was about 3000K. What would be the wavelength at which a gas of that temperature would emit the most energy? (Hint: Remember Wien’s Law, λmax = 2.9 x 106 / T(K), with in nanometers.) ...
... a) The temperature of the gas when atoms formed from free electrons and nuclei was about 3000K. What would be the wavelength at which a gas of that temperature would emit the most energy? (Hint: Remember Wien’s Law, λmax = 2.9 x 106 / T(K), with in nanometers.) ...
THE DOPPLER EFFECT
... attraction among the galaxies. We do not presently know whether there is enough mass in the universe to cause enough attraction to halt the expansion eventually. But perhaps more interesting than the distant future of the universe is what its present expansion implies about its past. Extrapolating b ...
... attraction among the galaxies. We do not presently know whether there is enough mass in the universe to cause enough attraction to halt the expansion eventually. But perhaps more interesting than the distant future of the universe is what its present expansion implies about its past. Extrapolating b ...
astronomy webquest…… explore the universe
... Stars and planets are made from gases in a __________________. The Milky Way Galaxy is approximately _______________ light years across. How much longer will our Sun last? _________________________ Lifetimes of stars range from ___________ to ____________ years. Our star orbits the centre of our gal ...
... Stars and planets are made from gases in a __________________. The Milky Way Galaxy is approximately _______________ light years across. How much longer will our Sun last? _________________________ Lifetimes of stars range from ___________ to ____________ years. Our star orbits the centre of our gal ...
How Telescopes Changed our Universe
... In our own solar system, telescopes found planets our eyes could not see. Are there other planets outside of our solar system? ...
... In our own solar system, telescopes found planets our eyes could not see. Are there other planets outside of our solar system? ...
Word
... Now that you have used Hubble’s constant on your own, describe the significance of Hubble’s constant in your own words. Consider these questions in your explanation. 1. Does the Universe have edges or a center? 2. What does this mean in terms of expansion? 3. Is expansion technically relative to the ...
... Now that you have used Hubble’s constant on your own, describe the significance of Hubble’s constant in your own words. Consider these questions in your explanation. 1. Does the Universe have edges or a center? 2. What does this mean in terms of expansion? 3. Is expansion technically relative to the ...
Lesson 1 - Structure of the Universe - Hitchcock
... How are distances in the universe measured? • Distances between most objects in the universe are so large that astronomers measure distances using the speed of light. • A light-year is the distance that light travels through space in one year. • Light travels through space at about 300,000 km/s, or ...
... How are distances in the universe measured? • Distances between most objects in the universe are so large that astronomers measure distances using the speed of light. • A light-year is the distance that light travels through space in one year. • Light travels through space at about 300,000 km/s, or ...
Lesson 1 - Structure of the Universe - Hitchcock
... How are distances in the universe measured? • Distances between most objects in the universe are so large that astronomers measure distances using the speed of light. • A light-year is the distance that light travels through space in one year. • Light travels through space at about 300,000 km/s, or ...
... How are distances in the universe measured? • Distances between most objects in the universe are so large that astronomers measure distances using the speed of light. • A light-year is the distance that light travels through space in one year. • Light travels through space at about 300,000 km/s, or ...
Take Home #1 Complete the following on your own paper. Do not
... 17) A Belgian priest, Georges Lamaître, was the first to develop a “big bang” theory. In 1927, after studying red shifts of galaxies, he proposed that the universe began with an immense infusion of pure energy into space. Later, Edwin Hubble discovered that the speed of a galaxy moving away from Ear ...
... 17) A Belgian priest, Georges Lamaître, was the first to develop a “big bang” theory. In 1927, after studying red shifts of galaxies, he proposed that the universe began with an immense infusion of pure energy into space. Later, Edwin Hubble discovered that the speed of a galaxy moving away from Ear ...
Our Universe
... •A black hole is a theoretical space where the gravitational pull is so incredibly strong that no radiation, including heat and light, cannot exist. •These black holes are a million to a billion times more massive than our sun! •Is there a black hole in the center of our Milky Way- YES! •The fundame ...
... •A black hole is a theoretical space where the gravitational pull is so incredibly strong that no radiation, including heat and light, cannot exist. •These black holes are a million to a billion times more massive than our sun! •Is there a black hole in the center of our Milky Way- YES! •The fundame ...
Unit 1
... • The raisins are fixed relative to the dough, but the dough expands, increasing the space between them. • Problem with these analogies – loaves and rubber bands have edges! – We have seen no ‘edge’ to the Universe; there are an equal number of galaxies in every direction! – Also, galaxies can move ...
... • The raisins are fixed relative to the dough, but the dough expands, increasing the space between them. • Problem with these analogies – loaves and rubber bands have edges! – We have seen no ‘edge’ to the Universe; there are an equal number of galaxies in every direction! – Also, galaxies can move ...
Take Home #1 Complete the following on your own paper. Do not
... 17) A Belgian priest, Georges Lamaître, was the first to develop a “big bang” theory. In 1927, after studying red shifts of galaxies, he proposed that the universe began with an immense infusion of pure energy into space. Later, Edwin Hubble discovered that the speed of a galaxy moving away from Ear ...
... 17) A Belgian priest, Georges Lamaître, was the first to develop a “big bang” theory. In 1927, after studying red shifts of galaxies, he proposed that the universe began with an immense infusion of pure energy into space. Later, Edwin Hubble discovered that the speed of a galaxy moving away from Ear ...
Universe
![](https://commons.wikimedia.org/wiki/Special:FilePath/Ilc_9yr_moll4096.png?width=300)
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.