PROBLEM SET #8 SOLUTIONS AST142 1. Free fall timescale and
... where I used initial condition to set the right hand side. At any time afterwards the radial component of velocity r˙ r ...
... where I used initial condition to set the right hand side. At any time afterwards the radial component of velocity r˙ r ...
UNIT VIII/B: THE EARTH IN SPACE – STARS AND GALAXIES
... 3. Understand why light years are used to measure distances in space. a. A light-year is a unit of distance (NOT TIME!!!). It is the distance that light can travel in one year. b. Light moves at a velocity of about 300,000 km each second (in a vacuum). So in one year, it can travel about 10 trillion ...
... 3. Understand why light years are used to measure distances in space. a. A light-year is a unit of distance (NOT TIME!!!). It is the distance that light can travel in one year. b. Light moves at a velocity of about 300,000 km each second (in a vacuum). So in one year, it can travel about 10 trillion ...
PH607 – Galaxies
... 7.2 Clusters of Galaxies Clusters are systems a few Mpc across, typically containing at least 50-100 luminous galaxies within the central 1 Mpc Clusters are gravitationally bound Clusters are filled with hot X-ray gas Only ~20% of galaxies live in clusters, most live in groups or in the “fi ...
... 7.2 Clusters of Galaxies Clusters are systems a few Mpc across, typically containing at least 50-100 luminous galaxies within the central 1 Mpc Clusters are gravitationally bound Clusters are filled with hot X-ray gas Only ~20% of galaxies live in clusters, most live in groups or in the “fi ...
Physics 130 Name
... 42._____The density of stars in the galactic disk is nearly the same in the spiral arms as between them. 43._____The Sun appears red at sunset because the blue light has been scattered away by the Earth’s atmosphere. 44._____Young stars in our Galaxy tend to be found in the galactic halo. 45._____Gl ...
... 42._____The density of stars in the galactic disk is nearly the same in the spiral arms as between them. 43._____The Sun appears red at sunset because the blue light has been scattered away by the Earth’s atmosphere. 44._____Young stars in our Galaxy tend to be found in the galactic halo. 45._____Gl ...
Galaxies – Island universes
... the first billion years or so after the Big Bang • Many have later infalling matter which has been pulled on by nearby mass and thus doesn’t fall straight in. It settles into a rotating disk, arranging itself into a flat, roughly circularly orbiting plane of material • This material gradually conden ...
... the first billion years or so after the Big Bang • Many have later infalling matter which has been pulled on by nearby mass and thus doesn’t fall straight in. It settles into a rotating disk, arranging itself into a flat, roughly circularly orbiting plane of material • This material gradually conden ...
12.4 Evolution of Stars More Massive than the Sun
... Its path across the H-R diagram is essentially a straight line – it stays as just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a supernova. ...
... Its path across the H-R diagram is essentially a straight line – it stays as just about the same luminosity as it cools off. Eventually the star dies in a violent explosion called a supernova. ...
Finish up Sun and begin Stars of the Sun Test 1 Study
... • Important as determines actual brightness but hard to measure as stars are so far away Closest Alpha Centauri 4.3 light years = 4 x 1013 km (1 AU = distance Earth to Sun = 8 light minutes) • Close stars use stellar parallax (heliocentric parallax or triangulation same meaning) • Can “easily” mea ...
... • Important as determines actual brightness but hard to measure as stars are so far away Closest Alpha Centauri 4.3 light years = 4 x 1013 km (1 AU = distance Earth to Sun = 8 light minutes) • Close stars use stellar parallax (heliocentric parallax or triangulation same meaning) • Can “easily” mea ...
COMMENTS ON HOMEWORK 1 In many cases the answer to a
... In many cases the answer to a question is in the text or was discussed in class. These comments are intended to clarify a few points. I generally do not provide answers that may be memorized and then regurgitated in the event (not improbable) that the question or its close relative appears later in ...
... In many cases the answer to a question is in the text or was discussed in class. These comments are intended to clarify a few points. I generally do not provide answers that may be memorized and then regurgitated in the event (not improbable) that the question or its close relative appears later in ...
10438 starlight - The Described and Captioned Media Program
... studying the light we receive from stars. The study of starlight not only reveals straightforward information like the varying brightness of stars, but it also shows other details, such as their spectra, intensity of radiation, surface temperature, relative speeds, and more. For these studies to con ...
... studying the light we receive from stars. The study of starlight not only reveals straightforward information like the varying brightness of stars, but it also shows other details, such as their spectra, intensity of radiation, surface temperature, relative speeds, and more. For these studies to con ...
August
... M13 At a distance of 25,100 light years, this globular cluster in the constellation Hercules (HER-cueleez) is about 145 light years in diameter. The age of M13 has been estimated at over 10 billion years. It contains over 300,000 stars. At the center, stars are about 500 times more concentrated than ...
... M13 At a distance of 25,100 light years, this globular cluster in the constellation Hercules (HER-cueleez) is about 145 light years in diameter. The age of M13 has been estimated at over 10 billion years. It contains over 300,000 stars. At the center, stars are about 500 times more concentrated than ...
young science communicator`s competition
... NARRATOR: [Old voice again] Of course, we know now that those bright lights we then called novae were in fact supernovae, explosions of massive stars. These are the most powerful events in the Universe. For a few days, a supernova, the death of just one star, temporarily outshines an entire galaxy o ...
... NARRATOR: [Old voice again] Of course, we know now that those bright lights we then called novae were in fact supernovae, explosions of massive stars. These are the most powerful events in the Universe. For a few days, a supernova, the death of just one star, temporarily outshines an entire galaxy o ...
Teacher`s Guide - Discovery Education
... 2 points: Students showed a satisfactory understanding of Earth’s place in the universe and the concepts of the speed of light and light-years; provided mostly accurate calculations for the distance of a light-year; identified two appropriate images for the “time machine telescope,” and provided com ...
... 2 points: Students showed a satisfactory understanding of Earth’s place in the universe and the concepts of the speed of light and light-years; provided mostly accurate calculations for the distance of a light-year; identified two appropriate images for the “time machine telescope,” and provided com ...
Astronomy Learning Objectives and Study Questions for Chapter 13
... 6. Briefly describe the conditions that must be met if a neutron star is to behave as an X-ray burster. 1. As He and H-shell fusion cause a low-mass star like Sol to expand a second time, its outer atmosphere will waft off into space to create a/an _____. A. planetary nebula B. supernova C. nova D. ...
... 6. Briefly describe the conditions that must be met if a neutron star is to behave as an X-ray burster. 1. As He and H-shell fusion cause a low-mass star like Sol to expand a second time, its outer atmosphere will waft off into space to create a/an _____. A. planetary nebula B. supernova C. nova D. ...
Supernova - Mid-Pacific Institute
... Type I supernova are useful to astronomers trying to sdadlSupernova determine the distances to other galaxies. Since all Type I supernova have about the same absolute brightness, astronomers can calculate how far away a Type I supernova is by measuring its apparent brightness and then calculatin ...
... Type I supernova are useful to astronomers trying to sdadlSupernova determine the distances to other galaxies. Since all Type I supernova have about the same absolute brightness, astronomers can calculate how far away a Type I supernova is by measuring its apparent brightness and then calculatin ...
8 clusters stellar evo
... High mass (higher luminosity) stars progress through life more quickly Lower mass stars take longer to be born, consume their fuel more slowly. ...
... High mass (higher luminosity) stars progress through life more quickly Lower mass stars take longer to be born, consume their fuel more slowly. ...
Lab Document - University of Iowa Astronomy and Astrophysics
... (8) Now let’s try and find a “Deep Sky” object using the Pocket Sky Atlas. We will look at the object M13 in the constellation of Hercules. Using the Star Wheel and SC1 chart, find Hercules. Both the Star Wheel and the SC1 indicate where M13 is located. The Pocket Sky Atlas has a more detailed map o ...
... (8) Now let’s try and find a “Deep Sky” object using the Pocket Sky Atlas. We will look at the object M13 in the constellation of Hercules. Using the Star Wheel and SC1 chart, find Hercules. Both the Star Wheel and the SC1 indicate where M13 is located. The Pocket Sky Atlas has a more detailed map o ...
proposed october viewing list
... OBJECT DESCRIPTIONS M11 Known as the Wild Duck cluster, this open cluster in the constellation Scutum, (SKEW-tum) is seen best with the 4” refractor at low magnification. It contains more than 2900 stars and is estimated to be about 250 million years old. M11 is receding from us at a speed of 27 km ...
... OBJECT DESCRIPTIONS M11 Known as the Wild Duck cluster, this open cluster in the constellation Scutum, (SKEW-tum) is seen best with the 4” refractor at low magnification. It contains more than 2900 stars and is estimated to be about 250 million years old. M11 is receding from us at a speed of 27 km ...
The Island Universe of Immanuel Kant - EU-HOU
... Only in the 20th century the idea of the “island Universe” gained firm observational support thanks to work of Edwin Hubble. He discovered that the distances to some “nebulae” are much greater than the sizes of the Galaxy. He named them “extragalactic nebulae”. (Today this term has been replaced by ...
... Only in the 20th century the idea of the “island Universe” gained firm observational support thanks to work of Edwin Hubble. He discovered that the distances to some “nebulae” are much greater than the sizes of the Galaxy. He named them “extragalactic nebulae”. (Today this term has been replaced by ...
Properties of Stars
... Some stars are just being born in their nebulas. Some have turned into black holes or supergiants, etc. If you graph all of the stars in our universe according to their brightness (absolute magnitude) and their temperature, they all fit into specific places on the graph based on what type of star th ...
... Some stars are just being born in their nebulas. Some have turned into black holes or supergiants, etc. If you graph all of the stars in our universe according to their brightness (absolute magnitude) and their temperature, they all fit into specific places on the graph based on what type of star th ...
Study Notes for Integrated Science Astronomy Unit These notes will
... light spectrum. This is a lot like our Balloon Universe Lab. The microwave background radiation that was examined by satellites, KOBE and WMAP, also help us to understand the age and distance of this expansion, as well as the first formation of matter. As space expanded and matter began to cool, gra ...
... light spectrum. This is a lot like our Balloon Universe Lab. The microwave background radiation that was examined by satellites, KOBE and WMAP, also help us to understand the age and distance of this expansion, as well as the first formation of matter. As space expanded and matter began to cool, gra ...
PHYS-638-07f: Problem set #0 Solutions
... c. At the distance you calculated in (a), what would the Sun’s flux here on Earth be (i.e. what would the solar constant be)? In class we noted that the solar constant is F⊙ = 1.4 × 106 erg/s/cm2 . If we now move the Sun 1800 times further away, then by the inverse-square law, the flux (which is wha ...
... c. At the distance you calculated in (a), what would the Sun’s flux here on Earth be (i.e. what would the solar constant be)? In class we noted that the solar constant is F⊙ = 1.4 × 106 erg/s/cm2 . If we now move the Sun 1800 times further away, then by the inverse-square law, the flux (which is wha ...
Nov13Guide - East-View
... your eyes. Rather bigger than our Milky Way, it is estimated that the Andromeda Galaxy is home to one trillion stars. ...
... your eyes. Rather bigger than our Milky Way, it is estimated that the Andromeda Galaxy is home to one trillion stars. ...
G485 5.5.1 Structure of the Universe
... Way. This black hole is relatively small in size, having a radius of only 6.25 light-hours, but it is massive because of the extraordinary amount of matter it contains, estimated at about 3.7 million solar masses! ...
... Way. This black hole is relatively small in size, having a radius of only 6.25 light-hours, but it is massive because of the extraordinary amount of matter it contains, estimated at about 3.7 million solar masses! ...
Volcanoes and Igneous Activity Earth
... Binary Stars and Stellar Mass • A binary star is one of two stars revolving around a common center of mass under their mutual gravitational attraction. • Binary stars are used to determine the star property most difficult to calculate—its mass. ...
... Binary Stars and Stellar Mass • A binary star is one of two stars revolving around a common center of mass under their mutual gravitational attraction. • Binary stars are used to determine the star property most difficult to calculate—its mass. ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.