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... Milky Way: Large Magellanic Cloud (LMC), Small Magellanic Cloud (SMC), Sagittarius dwarf, etc ...
... Milky Way: Large Magellanic Cloud (LMC), Small Magellanic Cloud (SMC), Sagittarius dwarf, etc ...
1 The Milky Way
... M (R) = Rv 2 /G For example, at the Sun’s orbit the rotation speed is 220 km s 1 , and the radial distance is 8 kpc. This gives a mass of M = 1011 M - a hundred blllion times the mass of the Sun. At this radius this estimate agrees quite well with what you might expect from the amount of starlight w ...
... M (R) = Rv 2 /G For example, at the Sun’s orbit the rotation speed is 220 km s 1 , and the radial distance is 8 kpc. This gives a mass of M = 1011 M - a hundred blllion times the mass of the Sun. At this radius this estimate agrees quite well with what you might expect from the amount of starlight w ...
Chapter15 (with interactive links)
... Our solar system is in the disk of the Milky Way, a barred spiral galaxy that is 100,000 light-years across. There is a supermassive black hole at the center of the galaxy, as well as an extended dark matter halo. The Milky Way offers many clues about the way galaxies form. ...
... Our solar system is in the disk of the Milky Way, a barred spiral galaxy that is 100,000 light-years across. There is a supermassive black hole at the center of the galaxy, as well as an extended dark matter halo. The Milky Way offers many clues about the way galaxies form. ...
Physics 127 Descriptive Astronomy Homework #20 Key
... 14-3. How did Edwin Hubble prove that the Andromeda “Nebula” is not a nebula within our Milky Way Galaxy? Hubble was able to detect Cepheid variable stars within that “Nebula.” Then by observing their light curves and using the known period- luminosity relation for Cepheids, he obtained and compared ...
... 14-3. How did Edwin Hubble prove that the Andromeda “Nebula” is not a nebula within our Milky Way Galaxy? Hubble was able to detect Cepheid variable stars within that “Nebula.” Then by observing their light curves and using the known period- luminosity relation for Cepheids, he obtained and compared ...
Slide 1
... There are hundreds of billions of estimated Galaxies but over the years technology (having bigger and better equipment )has changed and now they are finding lots more of them. There are three types of Galaxies- Spiral-Elliptical-Irregular The only difference in these Galaxies are the size . The sma ...
... There are hundreds of billions of estimated Galaxies but over the years technology (having bigger and better equipment )has changed and now they are finding lots more of them. There are three types of Galaxies- Spiral-Elliptical-Irregular The only difference in these Galaxies are the size . The sma ...
Galaxies and the Big Bang Theory
... •Look like _______________ or __________________ ______________. •Billions of stars •Contain very little _________ and ________ between stars. ...
... •Look like _______________ or __________________ ______________. •Billions of stars •Contain very little _________ and ________ between stars. ...
The Milky Way at Different Wavelengths
... support legs for the radio receiver on the telescope is visible as a 'cross' shape. Atomic Hydrogen – “21-cm radiation” (Angular resolution: 45-60'; survey conducted over a period of 4 years using the Dwingeloo 25-m radio telescope, operated by the Netherlands Foundation for Research in Astronomy.) ...
... support legs for the radio receiver on the telescope is visible as a 'cross' shape. Atomic Hydrogen – “21-cm radiation” (Angular resolution: 45-60'; survey conducted over a period of 4 years using the Dwingeloo 25-m radio telescope, operated by the Netherlands Foundation for Research in Astronomy.) ...
Ch. 28 Test Topics
... -Know that the faster the source of light is moving the greater the shift of light. -Know that Edwin Hubble discovered that the farther away a galaxy was, the faster it was moving away from Earth. -Know the universe is continually expanding and how we know this. -Be able to describe the Big Bang the ...
... -Know that the faster the source of light is moving the greater the shift of light. -Know that Edwin Hubble discovered that the farther away a galaxy was, the faster it was moving away from Earth. -Know the universe is continually expanding and how we know this. -Be able to describe the Big Bang the ...
Galaxies Galore
... Click on: Launch Interactive (You may want to Mute sound) 1. “How Big? “ If our solar system were the size of a quarter, the galaxy would be __________. 2. How large is the “Search Bubble” for life? ______________ How many stars? ___________. 3. In which “Spiral Arm” is our solar system located? ___ ...
... Click on: Launch Interactive (You may want to Mute sound) 1. “How Big? “ If our solar system were the size of a quarter, the galaxy would be __________. 2. How large is the “Search Bubble” for life? ______________ How many stars? ___________. 3. In which “Spiral Arm” is our solar system located? ___ ...
Chapter 27 Stars and Galaxies
... 27.2 Stellar Evolution Some white dwarfs do not just cool and die. They will have one or more large explosions and become a nova A supernova is a star that has such a tremendous explosion that it blows itself apart. Before a supernova all of the stars elements will be fused into iron ...
... 27.2 Stellar Evolution Some white dwarfs do not just cool and die. They will have one or more large explosions and become a nova A supernova is a star that has such a tremendous explosion that it blows itself apart. Before a supernova all of the stars elements will be fused into iron ...
Exercise G1: Our Home Galaxy, the Milky Way
... Question 3: The Sun is moving with a velocity of about 220 km/sec in its orbit about the galactic center. Using your answer from Question 2, what is the approximate time required for the Sun (and the entire Solar System) to complete one orbit of the galactic center? a. 115 million years b. 230 m ...
... Question 3: The Sun is moving with a velocity of about 220 km/sec in its orbit about the galactic center. Using your answer from Question 2, what is the approximate time required for the Sun (and the entire Solar System) to complete one orbit of the galactic center? a. 115 million years b. 230 m ...
pdf format
... Shapley Maps the Galaxy • Distribution of globular clusters is not symmetric about our position in the Galaxy • 30% of G.C.s are found in only 2% of the sky toward ...
... Shapley Maps the Galaxy • Distribution of globular clusters is not symmetric about our position in the Galaxy • 30% of G.C.s are found in only 2% of the sky toward ...
Powerpoint for today
... If core with about 3 MSun or more collapses, not even neutron pressure can stop it (total mass of star about 25 MSun). Core collapses to a point, a "singularity". Gravity is so strong that nothing can escape, not even light => black hole. Schwarzschild radius for Earth is 1 cm. For a 3 MSun object, ...
... If core with about 3 MSun or more collapses, not even neutron pressure can stop it (total mass of star about 25 MSun). Core collapses to a point, a "singularity". Gravity is so strong that nothing can escape, not even light => black hole. Schwarzschild radius for Earth is 1 cm. For a 3 MSun object, ...
Slides R. Bower
... BCG Star Formation Rate “the cooling flow crisis” Voit & Bryan process seems to work! But where does the low entropy gas go? ...
... BCG Star Formation Rate “the cooling flow crisis” Voit & Bryan process seems to work! But where does the low entropy gas go? ...
Document
... Not a black hole from a single stellar collapse, but must be built up over time. We shall meet these again when we come to look at quasars, but we have to ask “Just how active was the young Milky Way”? ...
... Not a black hole from a single stellar collapse, but must be built up over time. We shall meet these again when we come to look at quasars, but we have to ask “Just how active was the young Milky Way”? ...
STAR SYTEMS AND GALAXIES
... • We can detect binary systems easily if one star blocks another, called an eclipsing binary. • We have found planets moving around stars in other systems. We can only detect very large planets because the planets must have enough gravity to effect the star. ...
... • We can detect binary systems easily if one star blocks another, called an eclipsing binary. • We have found planets moving around stars in other systems. We can only detect very large planets because the planets must have enough gravity to effect the star. ...
Cosmic Collisions
... scattered in random directions, but gravity acts so gradually that planetary orbits are not disturbed. A collision takes about a billion years; during the last billion years, life on Earth evolved from single-celled organisms to amazingly primative apes who still think digital watches are pretty nea ...
... scattered in random directions, but gravity acts so gradually that planetary orbits are not disturbed. A collision takes about a billion years; during the last billion years, life on Earth evolved from single-celled organisms to amazingly primative apes who still think digital watches are pretty nea ...
Abstract
... How a galaxy began its life is one of the greatest mysteries. The recent advances in observational technique allow us to directly observe the universe 10 billion years ago and find bright young objects there. Lyman α emitters1 have been recently discovered at redshifts greater than 3 (2.1109 yr aft ...
... How a galaxy began its life is one of the greatest mysteries. The recent advances in observational technique allow us to directly observe the universe 10 billion years ago and find bright young objects there. Lyman α emitters1 have been recently discovered at redshifts greater than 3 (2.1109 yr aft ...
Winning Entries in this week’s Galaxy
... • Galaxy types • Ancient history • Milky Way and spiral galaxy morphology • Nuclear bulge • Disk • Stellar halo • Dark matter halo • Star-forming regions • Chemical enrichment ...
... • Galaxy types • Ancient history • Milky Way and spiral galaxy morphology • Nuclear bulge • Disk • Stellar halo • Dark matter halo • Star-forming regions • Chemical enrichment ...
Nineteenth lecture
... How many stars in a galaxy? Milky Way: 200 billion; Andromeda: 1 TRILLION! ...
... How many stars in a galaxy? Milky Way: 200 billion; Andromeda: 1 TRILLION! ...
Today`s Powerpoint
... If core with about 3 MSun or more collapses, not even neutron pressure can stop it (total mass of star about 25 MSun). Core collapses to a point, a "singularity". Gravity is so strong that nothing can escape, not even light => black hole. Schwarzschild radius for Earth is 1 cm. For a 3 MSun object, ...
... If core with about 3 MSun or more collapses, not even neutron pressure can stop it (total mass of star about 25 MSun). Core collapses to a point, a "singularity". Gravity is so strong that nothing can escape, not even light => black hole. Schwarzschild radius for Earth is 1 cm. For a 3 MSun object, ...
Class notes 2 - University of Texas Astronomy
... Sagittarius, is visible in the infrared and radio). Bright stars and gas are concentrated in spiral arms. The gas is clumped in clouds, though there is also a diffuse background of gas. ...
... Sagittarius, is visible in the infrared and radio). Bright stars and gas are concentrated in spiral arms. The gas is clumped in clouds, though there is also a diffuse background of gas. ...