Leo Powerpoint
... Hercules plugged one of the openings and entered the den empty-handed from the other. He strangled the lion to his death and using one of his claws tore away his skin, which he later used as an impermeable armor on his body for the remaining 11 tasks that he had to complete. As Hercules came out suc ...
... Hercules plugged one of the openings and entered the den empty-handed from the other. He strangled the lion to his death and using one of his claws tore away his skin, which he later used as an impermeable armor on his body for the remaining 11 tasks that he had to complete. As Hercules came out suc ...
April 2015 - Southern Astronomical Society
... been shown to be insubstantial — passing through itself as well as everything else. A study of data returned from NASA’s Hubble Space Telescope and the ESA’s Chandra X-ray Observatory has found dark matter does not slow down when it collides with itself. This is significant as it shows the ghostly s ...
... been shown to be insubstantial — passing through itself as well as everything else. A study of data returned from NASA’s Hubble Space Telescope and the ESA’s Chandra X-ray Observatory has found dark matter does not slow down when it collides with itself. This is significant as it shows the ghostly s ...
The Great Debate - The Story Behind The Science
... he concluded the two were about 3800 light-years apart. Most astronomers, however, felt that the Milky Way was far larger than 120 light-years – an accepted consensus around 1910 was about 30,000 light-years in diameter. Efforts continued to determine the sizes of nebulae. The German astronomer, Max ...
... he concluded the two were about 3800 light-years apart. Most astronomers, however, felt that the Milky Way was far larger than 120 light-years – an accepted consensus around 1910 was about 30,000 light-years in diameter. Efforts continued to determine the sizes of nebulae. The German astronomer, Max ...
CONTINUING GALACTIC FORMATION
... -There are tremendous quantities of radio signals emitted by the Milky Way's nucleus. -The immediate environment surrounding many hot blue stars. -Novae and Supernovae art frequent. -Observation of supergiant stars of short life times indicates that stars are being formed in the galactic center. -Th ...
... -There are tremendous quantities of radio signals emitted by the Milky Way's nucleus. -The immediate environment surrounding many hot blue stars. -Novae and Supernovae art frequent. -Observation of supergiant stars of short life times indicates that stars are being formed in the galactic center. -Th ...
a MS Word version.
... series of equations, since there is actually more than one equation within some of the four equation "descriptions"), that describe the physics that can be used to calculate the internal structure and time evolution of the Sun and stars. For each equation give a short description of the physical pro ...
... series of equations, since there is actually more than one equation within some of the four equation "descriptions"), that describe the physics that can be used to calculate the internal structure and time evolution of the Sun and stars. For each equation give a short description of the physical pro ...
Word version of Episode 704
... The Andromeda galaxy M31 can just, but only just, be seen with the naked eye. Its light, 2 million years old, is the oldest light you can see with the unaided eye. The Andromeda galaxy, M31, is the nearest neighbour large galaxy to our own Galaxy, the Milky Way. It is about 2.2 million light years a ...
... The Andromeda galaxy M31 can just, but only just, be seen with the naked eye. Its light, 2 million years old, is the oldest light you can see with the unaided eye. The Andromeda galaxy, M31, is the nearest neighbour large galaxy to our own Galaxy, the Milky Way. It is about 2.2 million light years a ...
The Southern Fall PDF - Treasures of the Southern Sky
... galaxy, as such a galactic collision would have disturbed the thin disk of stars, creating a small bulge in its center. Most astronomers think that galaxies grow by merging with other galaxies, in a process called hierarchical galaxy formation. Over time, this should create large bulges in the cente ...
... galaxy, as such a galactic collision would have disturbed the thin disk of stars, creating a small bulge in its center. Most astronomers think that galaxies grow by merging with other galaxies, in a process called hierarchical galaxy formation. Over time, this should create large bulges in the cente ...
The Evolution of Galaxy - Tufts Institute of Cosmology
... astronomers felt they at least understood the basic properties of clusters: They consisted of speeding galaxies bound together by huge amounts of dark matter. They were stable and immutable objects. Then came 1970. In that year a new satellite, named Uhuru (“freedom” in Swahili) in honor of its laun ...
... astronomers felt they at least understood the basic properties of clusters: They consisted of speeding galaxies bound together by huge amounts of dark matter. They were stable and immutable objects. Then came 1970. In that year a new satellite, named Uhuru (“freedom” in Swahili) in honor of its laun ...
Baryons at Low Densities: The Stellar Halos around Galaxies
... Only a half dozen luminous early-type galaxies are close enough to resolve individual stars in the halos and study their properties. Marina Rejkuba summarised the previous studies, most of which concentrated on the nearest giant elliptical galaxy NGC 5128, known also as Centaurus A. The bulk of the ...
... Only a half dozen luminous early-type galaxies are close enough to resolve individual stars in the halos and study their properties. Marina Rejkuba summarised the previous studies, most of which concentrated on the nearest giant elliptical galaxy NGC 5128, known also as Centaurus A. The bulk of the ...
Are Gamma-Ray Bursts good Star Formation Indicators?
... We may therefore hope that simply counting the GRB rate as a function of redshift will tell us the star formation history of the universe. As star formation indicators GRBs have a number of potentially important advantages over other approaches: 1. They should be detectable in the nIR to very high r ...
... We may therefore hope that simply counting the GRB rate as a function of redshift will tell us the star formation history of the universe. As star formation indicators GRBs have a number of potentially important advantages over other approaches: 1. They should be detectable in the nIR to very high r ...
Hubble`s Constant - Scientific Research Publishing
... some definite past time; in such a way that the expansion rate determines the age of the Universe. Hubble’s constant measures how fast is the process of the expansion, and it is involved in Hubble’s law. The larger the Hubble’s constant, the faster the expansion rate. Also, Hubble’s constant is a me ...
... some definite past time; in such a way that the expansion rate determines the age of the Universe. Hubble’s constant measures how fast is the process of the expansion, and it is involved in Hubble’s law. The larger the Hubble’s constant, the faster the expansion rate. Also, Hubble’s constant is a me ...
Penentuan Jarak dalam Astronomi II
... seems to be definitely found from the theory as well as from observations in globular clusters and nearby galaxies differ by [Fe/H] Zero-point refinement is Main problem in RR Lyrae distance scale studies ...
... seems to be definitely found from the theory as well as from observations in globular clusters and nearby galaxies differ by [Fe/H] Zero-point refinement is Main problem in RR Lyrae distance scale studies ...
An Ancient Universe
... Observatory in Chile is seen silhouetted against the Magellanic Clouds, two nearby galaxies fragile foothold on the surface (seen as fuzzy star groups at left) and the inner regions of our own Milky Way Galaxy (stretching upwards toward the right). Taken by Roger Smith with a very sensitive electron ...
... Observatory in Chile is seen silhouetted against the Magellanic Clouds, two nearby galaxies fragile foothold on the surface (seen as fuzzy star groups at left) and the inner regions of our own Milky Way Galaxy (stretching upwards toward the right). Taken by Roger Smith with a very sensitive electron ...
AUI CA science talk - National Radio Astronomy Observatory
... • NRAO has world-leading expertise in low freq H/W and S/W, and is developing critical wide field imaging software for LWA, EVLA -additional resources could benefit all experiments • NRAO has interest in contributing to development of, and potentially operating, next-gen experiment, perhaps parallel ...
... • NRAO has world-leading expertise in low freq H/W and S/W, and is developing critical wide field imaging software for LWA, EVLA -additional resources could benefit all experiments • NRAO has interest in contributing to development of, and potentially operating, next-gen experiment, perhaps parallel ...
The cosmic distance scale
... galaxy is inclined at an angle i to the line of sight, the observed line of sight velocity will vary from + Vc sin i to - Vc sin i relative to the systemic velocity of the galaxy. This results in a double horn line profile. Thus measuring the width of the line we get a direct estimate of the circula ...
... galaxy is inclined at an angle i to the line of sight, the observed line of sight velocity will vary from + Vc sin i to - Vc sin i relative to the systemic velocity of the galaxy. This results in a double horn line profile. Thus measuring the width of the line we get a direct estimate of the circula ...
A n A n c i e n... How Astronomers Know the Vast Scale of Cosmic Time
... Observatory in Chile is seen silhouetted against the Magellanic Clouds, two nearby galaxies fragile foothold on the surface (seen as fuzzy star groups at left) and the inner regions of our own Milky Way Galaxy (stretching upwards toward the right). Taken by Roger Smith with a very sensitive electron ...
... Observatory in Chile is seen silhouetted against the Magellanic Clouds, two nearby galaxies fragile foothold on the surface (seen as fuzzy star groups at left) and the inner regions of our own Milky Way Galaxy (stretching upwards toward the right). Taken by Roger Smith with a very sensitive electron ...
Living Things - Fairfield-Suisun Unified School District
... at different wavelengths. Astronomers are able to learn a great deal about the Crab Nebula by examining these different images. The images are shown at different scales. ...
... at different wavelengths. Astronomers are able to learn a great deal about the Crab Nebula by examining these different images. The images are shown at different scales. ...
The Milky Way Galaxy
... The hydrogen atom, if it is in the spin parallel state, can make a transition to the spin anti-parallel state releasing energy When a transition does a occur, energy is released corresponding to a wavelength of 21 cm, which is in the radio portion of the electromagnetic spectrum This radiation can p ...
... The hydrogen atom, if it is in the spin parallel state, can make a transition to the spin anti-parallel state releasing energy When a transition does a occur, energy is released corresponding to a wavelength of 21 cm, which is in the radio portion of the electromagnetic spectrum This radiation can p ...
Document
... In 2004, IRS 13E was resolved into 20 distinct stars with 0.04’’ NIR imaging. Unlike IRS 16, IRS 13E is very compact and not being tidally disrupted into a ring of stars by the SMBH. By following the stellar motions, the dark mass was found to be greater than ...
... In 2004, IRS 13E was resolved into 20 distinct stars with 0.04’’ NIR imaging. Unlike IRS 16, IRS 13E is very compact and not being tidally disrupted into a ring of stars by the SMBH. By following the stellar motions, the dark mass was found to be greater than ...
OUR SOLAR SYSTEM
... quiet backwater of a barred spiral galaxy known as the Milky Way, itself one of billions of galaxies. Yet at the same time, we can take heart in knowing that our little tract of the universe remains exceptional as the only place where we know life exists. Our solar system hosts one abode for life, E ...
... quiet backwater of a barred spiral galaxy known as the Milky Way, itself one of billions of galaxies. Yet at the same time, we can take heart in knowing that our little tract of the universe remains exceptional as the only place where we know life exists. Our solar system hosts one abode for life, E ...
Summary Of the Structure of the Milky Way
... nature of the Milky Way galaxy, but are not “deep” enough probes to fully reveal the structure of the Milky Way. • Open clusters can define the thickness of the Milky Way’s thin disk where star formation is active. • Globular clusters allow astronomers to know the direction to the center of our gala ...
... nature of the Milky Way galaxy, but are not “deep” enough probes to fully reveal the structure of the Milky Way. • Open clusters can define the thickness of the Milky Way’s thin disk where star formation is active. • Globular clusters allow astronomers to know the direction to the center of our gala ...
Stars and Galaxies
... shifted towards the red part of the visible spectrum The faster they move away from us, the more they are redshifted. Thus, redshift is a reasonable way to measure the speed of an object. When we observe the redshift of galaxies, almost every galaxy appears to be moving away from us – the Univer ...
... shifted towards the red part of the visible spectrum The faster they move away from us, the more they are redshifted. Thus, redshift is a reasonable way to measure the speed of an object. When we observe the redshift of galaxies, almost every galaxy appears to be moving away from us – the Univer ...
CHP 15
... a. they did not count the brightest stars. b. they did not study the southern sky. c. they did not have large enough telescopes. d. they only observed stars in the disk of the galaxy and not the halo. e. they did not know about interstellar dust clouds. 2. Which of the following is not a characteris ...
... a. they did not count the brightest stars. b. they did not study the southern sky. c. they did not have large enough telescopes. d. they only observed stars in the disk of the galaxy and not the halo. e. they did not know about interstellar dust clouds. 2. Which of the following is not a characteris ...
30 Doradus - HubbleSOURCE
... 1. Gigantic regions of star formation are complex systems where different generations of star affect each other’s evolution 2. At high redshift we cannot see the complexity of the star forming regions, and we derive a simplified history of star formation 3. A comparison between what we see in nearby ...
... 1. Gigantic regions of star formation are complex systems where different generations of star affect each other’s evolution 2. At high redshift we cannot see the complexity of the star forming regions, and we derive a simplified history of star formation 3. A comparison between what we see in nearby ...
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.