Lecture24
... are the superposition of millions or billions of stellar spectra. For all but a few of the nearest galaxies, the absorption and emission lines are redshifted relative to the solar spectrum. ...
... are the superposition of millions or billions of stellar spectra. For all but a few of the nearest galaxies, the absorption and emission lines are redshifted relative to the solar spectrum. ...
The resolved stellar populations of M32 Monachesi, Antonela
... Understanding their formation and evolution throughout cosmic time will lead us to learn about the history of the Universe itself and, therefore, it is one of the most important disciplines in modern astronomy. Galaxies are enormous gravitationally bound systems composed of billions of stars, gas an ...
... Understanding their formation and evolution throughout cosmic time will lead us to learn about the history of the Universe itself and, therefore, it is one of the most important disciplines in modern astronomy. Galaxies are enormous gravitationally bound systems composed of billions of stars, gas an ...
Unit 1
... • He revised the size of the galaxy to around 18,000 parsecs (18 kiloparsecs, or kpc), again with the Sun near the center • Both Herschel and Kapteyn were correct in depicting the shape of the galaxy as a disk, with most of the stars lying in more or less the same plane (the galactic plane) ...
... • He revised the size of the galaxy to around 18,000 parsecs (18 kiloparsecs, or kpc), again with the Sun near the center • Both Herschel and Kapteyn were correct in depicting the shape of the galaxy as a disk, with most of the stars lying in more or less the same plane (the galactic plane) ...
Galaxies, Cosmology and the Accelera`ng Universe
... • The central black hole blasts out large amounts of ...
... • The central black hole blasts out large amounts of ...
Winners of the OBAFGKM Mnemonic Quasars & Active Galactic Nuclei—4 April
... the Schwarzschild radius of a black hole. RS=3km M/M¤. RS=3km if M=M¤. RS=3×106km (3 times moon’s orbit) if M=106M¤. RS=3×109km (Saturn’s) if M=109M¤. ...
... the Schwarzschild radius of a black hole. RS=3km M/M¤. RS=3km if M=M¤. RS=3×106km (3 times moon’s orbit) if M=106M¤. RS=3×109km (Saturn’s) if M=109M¤. ...
The Hubble Redshift Distance Relation
... galaxies were moving away from us, at rather large speeds. In the 1920’s, Edwin Hubble measured the distances to many galaxies, and determined an interesting relationship: the farther away the galaxy, the faster it appears to be moving away from us. If the motions of galaxies are purely do to random ...
... galaxies were moving away from us, at rather large speeds. In the 1920’s, Edwin Hubble measured the distances to many galaxies, and determined an interesting relationship: the farther away the galaxy, the faster it appears to be moving away from us. If the motions of galaxies are purely do to random ...
About SDSS - Astro Projects
... SDSS mainly imaged the area around the North Galactic Pole (RA = 193 deg, Dec = 27 deg). This is a point directly 'above' our position in the Milky Way Galaxy. Because of this the survey includes hardly any supernova remnants or planetary nebulae. This is because these objects are remnants of dead s ...
... SDSS mainly imaged the area around the North Galactic Pole (RA = 193 deg, Dec = 27 deg). This is a point directly 'above' our position in the Milky Way Galaxy. Because of this the survey includes hardly any supernova remnants or planetary nebulae. This is because these objects are remnants of dead s ...
understanding-the
... All galaxies are showing red shift. Telling scientist that all galaxies are moving away from each other. If we put this motion of the galaxies in reverse all galaxies would have been in one central location. From this location 13 billion years ago a large explosive happened sending all matter outwar ...
... All galaxies are showing red shift. Telling scientist that all galaxies are moving away from each other. If we put this motion of the galaxies in reverse all galaxies would have been in one central location. From this location 13 billion years ago a large explosive happened sending all matter outwar ...
Chapter 30 Review
... pulsation, astronomers can determine its luminosity and calculate how far away a variable star must be to appear as dim or as bright as it does. ...
... pulsation, astronomers can determine its luminosity and calculate how far away a variable star must be to appear as dim or as bright as it does. ...
Astronomy Final C - Tarleton State University
... 5. Degenerate gases ? cool without losing their pressure. A.can B.cannot 6. ? develop where supernova explosions leave behind a “core” of approximately 1.4 to 2 or 3 stellar masses. A.Brown Dwarfs B.Red Dwarfs C.White Dwarfs D.Neutron Stars E.Black Holes 7. Inertial Mass ? gravitational mass. A.equa ...
... 5. Degenerate gases ? cool without losing their pressure. A.can B.cannot 6. ? develop where supernova explosions leave behind a “core” of approximately 1.4 to 2 or 3 stellar masses. A.Brown Dwarfs B.Red Dwarfs C.White Dwarfs D.Neutron Stars E.Black Holes 7. Inertial Mass ? gravitational mass. A.equa ...
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 ...
HIERARCHICAL GALAXY ASSEMBLY AND ITS MANIFESTATIONS
... gas, which turns into stars The formation mechanism is going to be imprinted in the bulge distribution. The distribution of bulge types seem to indicate that secular and classical channels are well separated. ...
... gas, which turns into stars The formation mechanism is going to be imprinted in the bulge distribution. The distribution of bulge types seem to indicate that secular and classical channels are well separated. ...
Lecture5 - Tufts Institute of Cosmology
... • Uses scientific Methodology to solve the problem (Who produces better data; who gives better interpretations?) ...
... • Uses scientific Methodology to solve the problem (Who produces better data; who gives better interpretations?) ...
Apparent magnitude
... Newly formed and young stars in the galactic plane in circular orbits (in one year ~1 M new stars) The metallicity of young stars increases Open star clusters, interstellar matter Also an “outer” disc of hydrogen (15 000 ly away) and a large disc of warm gas ( ~10 000K) High-velocity clouds (HVC), ...
... Newly formed and young stars in the galactic plane in circular orbits (in one year ~1 M new stars) The metallicity of young stars increases Open star clusters, interstellar matter Also an “outer” disc of hydrogen (15 000 ly away) and a large disc of warm gas ( ~10 000K) High-velocity clouds (HVC), ...
Two-Gyro Performance, Scheduling and Acquisitions
... – This problem was identified by the OTA SEs in some follow-on analysis of the previous problem’s test results. However, the cause of this problem is different. – Problem only occurs with Target-ReAcq style Acqs/ReAcqs where both PASS and the onboard ReAcq process are effectively accounting for a po ...
... – This problem was identified by the OTA SEs in some follow-on analysis of the previous problem’s test results. However, the cause of this problem is different. – Problem only occurs with Target-ReAcq style Acqs/ReAcqs where both PASS and the onboard ReAcq process are effectively accounting for a po ...
The Milky Way - Montgomery College
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million ...
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million ...
The Milky Way * A Classic Galaxy
... • Pop I,II show MW formed spheroid first, then disk more gradually. • Hubble discovered Cepheids in Andromeda Nebula, so it’s a Galaxy, and we must be one too • Star formation happening in disk right through today • 10 million solar mass Giant black hole in nucleus of our Galaxy, evidence by rapid o ...
... • Pop I,II show MW formed spheroid first, then disk more gradually. • Hubble discovered Cepheids in Andromeda Nebula, so it’s a Galaxy, and we must be one too • Star formation happening in disk right through today • 10 million solar mass Giant black hole in nucleus of our Galaxy, evidence by rapid o ...
How Big Is Our Universe? - Harvard
... galaxies not as they are today, but as they looked long before there was life on Earth. Some galaxies are so far away that they appear as tiny smudges, even through the largest telescopes. It’s tough to determine how large or bright these fuzzy distant galaxies are. But astronomers can figure out th ...
... galaxies not as they are today, but as they looked long before there was life on Earth. Some galaxies are so far away that they appear as tiny smudges, even through the largest telescopes. It’s tough to determine how large or bright these fuzzy distant galaxies are. But astronomers can figure out th ...
ASTR 1120-001 Final Examination Phil Armitage, Bruce Ferguson
... 67. Suppose that we lived in a Big Crunch Universe at a time when it was contracting, rather than expanding. If you measured the velocities of many galaxies, you would find that typically: (a) Galaxies (except very nearby ones) were moving away from you, with the most distant ones moving away the sl ...
... 67. Suppose that we lived in a Big Crunch Universe at a time when it was contracting, rather than expanding. If you measured the velocities of many galaxies, you would find that typically: (a) Galaxies (except very nearby ones) were moving away from you, with the most distant ones moving away the sl ...
70 Thousand Million, Million, Million Stars in Space
... as a way of mapping the sky, Some of the stars in the night sky helping sailors to navigate at are grouped into constellations. night. The largest constellation There are 88 constellations. They is Hydra; it is made up of are formations of stars that join up 16 main stars and is said to like a dot-t ...
... as a way of mapping the sky, Some of the stars in the night sky helping sailors to navigate at are grouped into constellations. night. The largest constellation There are 88 constellations. They is Hydra; it is made up of are formations of stars that join up 16 main stars and is said to like a dot-t ...
Staring Back to Cosmic Dawn - UC-HiPACC
... The Case of the Chaotic Blue Galaxies Ever since Hubble’s first spectacular images of distant galaxies, an enduring puzzle has been why early starforming galaxies look much more irregular and jumbled than nearby blue galaxies. Nearby blue galaxies are relatively smooth. The most beautiful ones are e ...
... The Case of the Chaotic Blue Galaxies Ever since Hubble’s first spectacular images of distant galaxies, an enduring puzzle has been why early starforming galaxies look much more irregular and jumbled than nearby blue galaxies. Nearby blue galaxies are relatively smooth. The most beautiful ones are e ...
Figure 1
... NGC5253 is a very nearby dwarf Irregular, hosting a central burst of star formation LEGUS observations at F275W and F336W are joined by ACS/WFC and HRC and WFC3/IR images from different programs Availability of both Ha (0.6563 mm) and Pb (1.282 mm) emission lines enables accurate foreground du ...
... NGC5253 is a very nearby dwarf Irregular, hosting a central burst of star formation LEGUS observations at F275W and F336W are joined by ACS/WFC and HRC and WFC3/IR images from different programs Availability of both Ha (0.6563 mm) and Pb (1.282 mm) emission lines enables accurate foreground du ...
Hubble’s Law & Black Holes at a Galaxy’s Center
... black hole in M87, a big elliptical galaxy, use Kepler’s 3rd Law. Mass = R3/P2 = RV2 R = 60ly V = 800km/s M = 3BillionM~ = 3,000,000,000M~ ...
... black hole in M87, a big elliptical galaxy, use Kepler’s 3rd Law. Mass = R3/P2 = RV2 R = 60ly V = 800km/s M = 3BillionM~ = 3,000,000,000M~ ...
Volcanoes and Igneous Activity Earth - Chapter 4
... • Outermost stars move the slowest • Sun rotates around the galactic nucleus once about every 200 million years ...
... • Outermost stars move the slowest • Sun rotates around the galactic nucleus once about every 200 million years ...
High School Science Essential Curriculum - Astronomy
... including surface temperature, luminosity, chemical composition, size (radius or diameter), mass, interstellar medium, motion, and distance. b. Discuss the stellar evolution of individual stars and describe the location of each on the Hertzsprung-Russell diagram, including protostars, main sequence ...
... including surface temperature, luminosity, chemical composition, size (radius or diameter), mass, interstellar medium, motion, and distance. b. Discuss the stellar evolution of individual stars and describe the location of each on the Hertzsprung-Russell diagram, including protostars, main sequence ...
Galaxy
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A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas and dust, and dark matter. The word galaxy is derived from the Greek galaxias (γαλαξίας), literally ""milky"", a reference to the Milky Way. Galaxies range in size from dwarfs with just a few thousand (103) stars to giants with one hundred trillion (1014) stars, each orbiting their galaxy's own center of mass. Galaxies are categorized according to their visual morphology, including elliptical, spiral, and irregular. Many galaxies are thought to have black holes at their active centers. The Milky Way's central black hole, known as Sagittarius A*, has a mass four million times greater than our own Sun. As of July 2015, EGSY8p7 is the oldest and most distant galaxy with a light travel distance of 13.2 billion light-years from Earth, and observed as it existed 570 million years after the Big Bang. Previously, as of May 2015, EGS-zs8-1 was the most distant known galaxy, estimated to have a light travel distance of 13.1 billion light-years away and to have 15% of the mass of the Milky Way.Approximately 170 billion (1.7 × 1011) to 200 billion (2.0 × 1011) galaxies exist in the observable universe. Most of the galaxies are 1,000 to 100,000 parsecs in diameter and usually separated by distances on the order of millions of parsecs (or megaparsecs). The space between galaxies is filled with a tenuous gas with an average density less than one atom per cubic meter. The majority of galaxies are gravitationally organized into associations known as galaxy groups, clusters, and superclusters. At the largest scale, these associations are generally arranged into sheets and filaments that are surrounded by immense voids.