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Universe and Galaxy Short Study Guide
... Astronomers are concluding that monstrous black holes were not born that big, as once believed, but instead grew on a diet of gas and stars controlled by their host galaxies in the beginning years of the universe. An initial look at 30 galaxies indicates that black holes do not precede a galaxy’s bi ...
... Astronomers are concluding that monstrous black holes were not born that big, as once believed, but instead grew on a diet of gas and stars controlled by their host galaxies in the beginning years of the universe. An initial look at 30 galaxies indicates that black holes do not precede a galaxy’s bi ...
Useful equations - Department of Physics and Astronomy
... the 14C concentration and decay rate measured for the remains, today, a time t since the organism died. Concentration is usually measured with a mass spectrometer, like isotope concentrations in the usual age-dating experiments. Decay rate can be measured more easily in large samples with a Geiger c ...
... the 14C concentration and decay rate measured for the remains, today, a time t since the organism died. Concentration is usually measured with a mass spectrometer, like isotope concentrations in the usual age-dating experiments. Decay rate can be measured more easily in large samples with a Geiger c ...
ISP 205 Review Questions, Week 13
... 5. The picture below shows two cross sections of the same chunk of the universe, at time intervals separated by 2 billion years. We are on the Milky Way Galaxy, and have measured the distances to a number of other galaxies at both times. Our results (in millions of light years) are shown on the fig ...
... 5. The picture below shows two cross sections of the same chunk of the universe, at time intervals separated by 2 billion years. We are on the Milky Way Galaxy, and have measured the distances to a number of other galaxies at both times. Our results (in millions of light years) are shown on the fig ...
AGN-Hubble
... The Hubble Constant and the Age of the Universe If you plot the scale of the Universe vs time, the Hubble constant is the slope of the line now. If it’s really constant, then the age of the Universe is just 1/H [since H=v/D=(d/t)/d]. That’s because if you know how fast we are expanding, you can run ...
... The Hubble Constant and the Age of the Universe If you plot the scale of the Universe vs time, the Hubble constant is the slope of the line now. If it’s really constant, then the age of the Universe is just 1/H [since H=v/D=(d/t)/d]. That’s because if you know how fast we are expanding, you can run ...
Solutions - UC Berkeley Astronomy w
... (10) page 451, question 5 (a) When we say that “the Universe is expanding,” we mean that space itself is expanding. (b) Although galaxies appear to be flying apart from each other, they are not actually moving through a preexisting space. They are moving apart because of the expansion of space itsel ...
... (10) page 451, question 5 (a) When we say that “the Universe is expanding,” we mean that space itself is expanding. (b) Although galaxies appear to be flying apart from each other, they are not actually moving through a preexisting space. They are moving apart because of the expansion of space itsel ...
PHYSICS 1500 - The University of Sydney
... The density of Comet Halley was found to be about 200 kg.m-3 (0.2 g.cm-3). What does this suggest about Comet Halley? (a) It is composed of about 50% rock and 50% frozen water and methane. (b) It is loosely packed ices with a small amount of rocky material. (c) It formed in the inner solar system an ...
... The density of Comet Halley was found to be about 200 kg.m-3 (0.2 g.cm-3). What does this suggest about Comet Halley? (a) It is composed of about 50% rock and 50% frozen water and methane. (b) It is loosely packed ices with a small amount of rocky material. (c) It formed in the inner solar system an ...
Class Project Physics 1010-042, Physics 1010
... advanced than we are. If they are a lot more advanced than us they could probably travel to us. Why this is a paradox is because if those intelligent life forms are more advanced and can travel through space “where are they?” 2. List and briefly explain (like in a paragraph for each) 4 possible res ...
... advanced than we are. If they are a lot more advanced than us they could probably travel to us. Why this is a paradox is because if those intelligent life forms are more advanced and can travel through space “where are they?” 2. List and briefly explain (like in a paragraph for each) 4 possible res ...
Stars and Galaxies
... Andromeda is like a larger version of our own Milky Way galaxy. It’s a flat disk that spans more than a quarter-million light-years. Its brightest stars form spiral arms that make the galaxy look like a pinwheel. Yet the galaxy is so far away that its structure is visible only through telescopes. Th ...
... Andromeda is like a larger version of our own Milky Way galaxy. It’s a flat disk that spans more than a quarter-million light-years. Its brightest stars form spiral arms that make the galaxy look like a pinwheel. Yet the galaxy is so far away that its structure is visible only through telescopes. Th ...
Document
... universe has been continuously expanding and, thus, there has been more and more distance between clusters of galaxies. Galaxies moving farther away from each other is known as the red shift. As light from distant galaxies approach earth there is an increase of space between earth and the galaxy, wh ...
... universe has been continuously expanding and, thus, there has been more and more distance between clusters of galaxies. Galaxies moving farther away from each other is known as the red shift. As light from distant galaxies approach earth there is an increase of space between earth and the galaxy, wh ...
Theme 7.2 -- The Complete Solar System
... On the right, we see several transits of particular stars showing the duration and the dimming of the light, and the link at the bottom leads you to a very nice brief animation in which we see how Kepler can detect multi-planet systems, where the flickering of the star tells us about the presence of ...
... On the right, we see several transits of particular stars showing the duration and the dimming of the light, and the link at the bottom leads you to a very nice brief animation in which we see how Kepler can detect multi-planet systems, where the flickering of the star tells us about the presence of ...
Essential Questions
... Patterns of the apparent motion of the sun, the moon, and stars in the sky can be observed, described, predicted, and explained with models. (MS-ESS1-1) Earth and its solar system are part of the Milky Way galaxy, which is one of many galaxies in the universe. (MS-ESS1-2) ...
... Patterns of the apparent motion of the sun, the moon, and stars in the sky can be observed, described, predicted, and explained with models. (MS-ESS1-1) Earth and its solar system are part of the Milky Way galaxy, which is one of many galaxies in the universe. (MS-ESS1-2) ...
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 ...
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 ...
Lecture5 - Tufts Institute of Cosmology
... Curvature strongest in vicinity of dense and massive objects (black holes are theoretical playgrounds for relativity people) ...
... Curvature strongest in vicinity of dense and massive objects (black holes are theoretical playgrounds for relativity people) ...
Lecture24
... universe must be finite, in space, time or both. This is fundamental test for any cosmological model The Big-bang explains Olbers’s paradox with the finiteness of the lifetime of the Universe and hence of its stars: The universe is NOT eternal in the past! The universe evolves! ...
... universe must be finite, in space, time or both. This is fundamental test for any cosmological model The Big-bang explains Olbers’s paradox with the finiteness of the lifetime of the Universe and hence of its stars: The universe is NOT eternal in the past! The universe evolves! ...
Chapter 1 Our Place in the Universe
... This means that galaxies ( or at least matter) must have been close together in the past. If we go back far enough, all the matter was concentrated in a small radius from which the expansion began. That is called the Big Bang. From the rate of expansion it is estimated that it occurred about 14 bill ...
... This means that galaxies ( or at least matter) must have been close together in the past. If we go back far enough, all the matter was concentrated in a small radius from which the expansion began. That is called the Big Bang. From the rate of expansion it is estimated that it occurred about 14 bill ...
1_Introduction
... Which of my assumptions is wrong? I assumed every star is visible from Earth. Since stars are opaque spheres, distant stars can hide behind nearby stars. ...
... Which of my assumptions is wrong? I assumed every star is visible from Earth. Since stars are opaque spheres, distant stars can hide behind nearby stars. ...
70 Thousand Million, Million, Million Stars in Space
... The pollution from large cities and industrialization makes it difficult for us to get a clear view of the stars and planets in the night sky. This was not such a problem for astronomers in the past, who began mapping the universe from what they could see with the naked eye. In the 1600s, the invent ...
... The pollution from large cities and industrialization makes it difficult for us to get a clear view of the stars and planets in the night sky. This was not such a problem for astronomers in the past, who began mapping the universe from what they could see with the naked eye. In the 1600s, the invent ...
Chapter14- Our Galaxy - SFA Physics and Astronomy
... Cool clouds of molecular gas from out of hydrogen and other elements. ...
... Cool clouds of molecular gas from out of hydrogen and other elements. ...
Measuring large distances
... The famous “Einstein Cross” Gravitational Lens : a distant galaxy’s light is bent by gravity around a closer intervening galaxy. The four light sources are actually images of only one light source – like when you see the sun in a lot of raindrops on the window. ...
... The famous “Einstein Cross” Gravitational Lens : a distant galaxy’s light is bent by gravity around a closer intervening galaxy. The four light sources are actually images of only one light source – like when you see the sun in a lot of raindrops on the window. ...
Fermi paradox
The Fermi paradox (or Fermi's paradox) is the apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilizations, such as in the Drake equation, and the lack of evidence for such civilizations. The basic points of the argument, made by physicists Enrico Fermi and Michael H. Hart, are: The Sun is a typical star, and there are billions of stars in the galaxy that are billions of years older. With high probability, some of these stars will have Earth-like planets, and if the earth is typical, some might develop intelligent life. Some of these civilizations might develop interstellar travel, a step the Earth is investigating now. Even at the slow pace of currently envisioned interstellar travel, the Milky Way galaxy could be completely traversed in about a million years.According to this line of thinking, the Earth should already have been visited by extraterrestrial aliens though Fermi saw no convincing evidence of this, nor any signs of alien intelligence anywhere in the observable universe, leading him to ask, ""Where is everybody?""