1. a) Astronomers use the parallax method to measure
... use almost the same method anytime we measure the masses of astronomical objects. What quantities would an astronomer have to measure to determine the mass of a cluster of galaxies? (Your method should include all of the mass, not just the mass of the luminous matter.) We measure masses by seeing ho ...
... use almost the same method anytime we measure the masses of astronomical objects. What quantities would an astronomer have to measure to determine the mass of a cluster of galaxies? (Your method should include all of the mass, not just the mass of the luminous matter.) We measure masses by seeing ho ...
HighRedshiftGalaxies
... on curvature being much larger in open and accelerating Universes than in the Einsteinde Sitter case. ...
... on curvature being much larger in open and accelerating Universes than in the Einsteinde Sitter case. ...
Galaxies - schoolphysics
... the trip across our galaxy. This means that the light that we see from the stars on the other side of the galaxy started out on its journey over eighty thousand years ago! If we could shrink the whole solar system out to the orbit of Pluto to the size of a grain of sand 1mm across then on the same s ...
... the trip across our galaxy. This means that the light that we see from the stars on the other side of the galaxy started out on its journey over eighty thousand years ago! If we could shrink the whole solar system out to the orbit of Pluto to the size of a grain of sand 1mm across then on the same s ...
Galaxy Far Far Away ppt
... surrounding stars, we can estimate the Sun’s velocity to be about 220 km/s. It takes about 240 million years for the Sun to orbit the center of the galaxy! ...
... surrounding stars, we can estimate the Sun’s velocity to be about 220 km/s. It takes about 240 million years for the Sun to orbit the center of the galaxy! ...
7th Grade Astronomy Study Guide
... a. main sequence, red giant, white dwarf b. main sequence, white dwarf, red giant c. red giant, white dwarf, main sequence d. white dwarf, main sequence, red giant ____ 34. Which of the following magnitudes indicates the brightest star? a. +4 c. 0 b. –0.11 d. –1 ____ 35. Where are globular clusters ...
... a. main sequence, red giant, white dwarf b. main sequence, white dwarf, red giant c. red giant, white dwarf, main sequence d. white dwarf, main sequence, red giant ____ 34. Which of the following magnitudes indicates the brightest star? a. +4 c. 0 b. –0.11 d. –1 ____ 35. Where are globular clusters ...
Chapter 27 Stars and Galaxies
... The contraction crushes the dense core of the star and become a black hole ...
... The contraction crushes the dense core of the star and become a black hole ...
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 ...
What MSU Astronomers Will Do with the SOAR
... • Long-lived stars from just after initial round of star formation • Found by searches through huge samples • Then detailed follow-up observations with SOAR and other even larger telescopes ...
... • Long-lived stars from just after initial round of star formation • Found by searches through huge samples • Then detailed follow-up observations with SOAR and other even larger telescopes ...
Evidence of the Big Bang and Structure of the Universe
... Type of galaxy is based on shape: elliptical (football-shaped), irregular, and spiral The Milky Way galaxy is a spiral galaxy, which has over 200 billion stars ...
... Type of galaxy is based on shape: elliptical (football-shaped), irregular, and spiral The Milky Way galaxy is a spiral galaxy, which has over 200 billion stars ...
Irregular Galaxies
... • Stars that appear to be grouped together are said to be “clustered” together. • There are two types of star clusters. • Open Clusters: Unorganized clusters of stars with hundreds of stars. • Globular Clusters: Clusters of stars that are grouped in a spherical shape and often contain more than 100, ...
... • Stars that appear to be grouped together are said to be “clustered” together. • There are two types of star clusters. • Open Clusters: Unorganized clusters of stars with hundreds of stars. • Globular Clusters: Clusters of stars that are grouped in a spherical shape and often contain more than 100, ...
Slayt 1
... • But how did these elements came into our body? • What happens to a star after it exhausts all ...
... • But how did these elements came into our body? • What happens to a star after it exhausts all ...
Galaxies and the Universe
... the History of Science” - Isaac Asimov • Conclusion: Speed of Light is the Same for All Observers • Implication: Space and Time Must Change to Keep Speed of Light Constant ...
... the History of Science” - Isaac Asimov • Conclusion: Speed of Light is the Same for All Observers • Implication: Space and Time Must Change to Keep Speed of Light Constant ...
File
... Galaxies – billions of star groups more than 100 billion galaxies, each containing billions of stars. Galaxies have different shapes: Spiral Galaxies – pinwheel-shaped: spiral arms that rotate nucleus in the center 30% of all galaxies, including the Milky Way (our galaxy) The oldest star ...
... Galaxies – billions of star groups more than 100 billion galaxies, each containing billions of stars. Galaxies have different shapes: Spiral Galaxies – pinwheel-shaped: spiral arms that rotate nucleus in the center 30% of all galaxies, including the Milky Way (our galaxy) The oldest star ...
Galaxy clusters - University of Iowa Astrophysics
... • By measuring multiple images of one source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
... • By measuring multiple images of one source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
Galaxy clusters - University of Iowa Astrophysics
... • By measuring multiple images of one source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
... • By measuring multiple images of one source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
Section 19.3
... Hubble focused a huge This image is from the telescope on an object Hubble Space Telescope, thought to be a nebula named for Edwin Hubble. in the constellation Can you tell the difference Andromeda. between starscould and see that • Hubble galaxies? the “nebula” actually consisted of faint, distant ...
... Hubble focused a huge This image is from the telescope on an object Hubble Space Telescope, thought to be a nebula named for Edwin Hubble. in the constellation Can you tell the difference Andromeda. between starscould and see that • Hubble galaxies? the “nebula” actually consisted of faint, distant ...
Microsoft Word 97
... 1. When did the Milky Way begin? _____________________________________________________ 2. Where does its name come from? ___________________________________________________ 3. What do we see when we look in the sky? _____________________________________________ 4. What does our galaxy look like from ...
... 1. When did the Milky Way begin? _____________________________________________________ 2. Where does its name come from? ___________________________________________________ 3. What do we see when we look in the sky? _____________________________________________ 4. What does our galaxy look like from ...
Astronomy 114 Problem Set # 7 Due: 30 Apr 2007 SOLUTIONS 1
... [Alternatively, we could use the M(r) relationship from Newton’s Laws that we derived earlier.] This mass is much larger than determined from the luminous matter, so there should be a lot of invisible “dark” mass in the NGC 4378. ...
... [Alternatively, we could use the M(r) relationship from Newton’s Laws that we derived earlier.] This mass is much larger than determined from the luminous matter, so there should be a lot of invisible “dark” mass in the NGC 4378. ...
Integrative Studies 410 Our Place in the Universe
... • A relation between the rotation speed of a spiral galaxy and its luminosity • The more mass a galaxy has the brighter it is the faster it rotates the wider the spectral lines are • Measuring rotation speed allows us to estimate luminosity; comparing to observed (apparent) brightness then tell ...
... • A relation between the rotation speed of a spiral galaxy and its luminosity • The more mass a galaxy has the brighter it is the faster it rotates the wider the spectral lines are • Measuring rotation speed allows us to estimate luminosity; comparing to observed (apparent) brightness then tell ...
Homework 1 - Course Pages of Physics Department
... (d) Calculate r1/2 and f for galaxies, using nG = 3 × 10−3 Mpc−3 , rG = 10kpc, and tG = 1010 a. 3. Newtonian cosmology. Use Euclidean geometry and Newtonian gravity, so that we interpret the expansion of the universe as an actual motion of galaxies instead of an expansion of space itself. Consider t ...
... (d) Calculate r1/2 and f for galaxies, using nG = 3 × 10−3 Mpc−3 , rG = 10kpc, and tG = 1010 a. 3. Newtonian cosmology. Use Euclidean geometry and Newtonian gravity, so that we interpret the expansion of the universe as an actual motion of galaxies instead of an expansion of space itself. Consider t ...
Document
... structure, some nebulae might actually be entire separate galaxies or island universes 1774-1781 - Messier catalog compiled (109 objects in Northern sky) including Andromeda galaxy - M31 ...
... structure, some nebulae might actually be entire separate galaxies or island universes 1774-1781 - Messier catalog compiled (109 objects in Northern sky) including Andromeda galaxy - M31 ...
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.