Galaxies - cloudfront.net
... Read this passage based on the text and answer the questions that follow. Types of Galaxies Galaxies are the biggest groups of stars in the universe. They can contain anywhere from a few million to many billions of stars. Galaxies are divided into three types according to shape: spiral, elliptical, ...
... Read this passage based on the text and answer the questions that follow. Types of Galaxies Galaxies are the biggest groups of stars in the universe. They can contain anywhere from a few million to many billions of stars. Galaxies are divided into three types according to shape: spiral, elliptical, ...
Galaxy Powerpoint Notes
... feature a shape that looks like a disk that usually has a bulge in the center and with arms that spiral outwards as the galaxy rotates. The most common spiral galaxies in our universe are the Milky Way Galaxy (the one we are in), and the Andromeda Galaxy (our nearest neighbor). Combined with Irregul ...
... feature a shape that looks like a disk that usually has a bulge in the center and with arms that spiral outwards as the galaxy rotates. The most common spiral galaxies in our universe are the Milky Way Galaxy (the one we are in), and the Andromeda Galaxy (our nearest neighbor). Combined with Irregul ...
Galaxy / Cluster Ecosystem Ming Sun (University of Alabama in Huntsville)
... Coronae survived for many cluster galaxies, esp. massive ones (e.g., > 60 % for L > 2 L* galaxies); they are metal rich ( ~ solar) and hotter than stars (spec = 0.3 – 1.1). Origin: a) galactic cool cores (stellar mass loss); b) remnants of large cool cores after stripping or AGN heating? Embedded c ...
... Coronae survived for many cluster galaxies, esp. massive ones (e.g., > 60 % for L > 2 L* galaxies); they are metal rich ( ~ solar) and hotter than stars (spec = 0.3 – 1.1). Origin: a) galactic cool cores (stellar mass loss); b) remnants of large cool cores after stripping or AGN heating? Embedded c ...
Chapter 1 The Discovery of Open Clusters - Willmann-Bell
... sufficiently useful that they were often used by amateur astronomers until recent times. Indeed, Herschel’s designations were used as the primary numbering system for deep-sky objects in Norton’s Star Atlas until the 18th Edition was published in 1989. Herschel also speculated on the origin of some ...
... sufficiently useful that they were often used by amateur astronomers until recent times. Indeed, Herschel’s designations were used as the primary numbering system for deep-sky objects in Norton’s Star Atlas until the 18th Edition was published in 1989. Herschel also speculated on the origin of some ...
15-3 Notes: Galaxies
... 5. Where is the sun located in the Milky Way? The sun is located about two-thirds of the way between the center and the edge of the galaxy. 6. What is a nebula? A nebula is a large cloud of gas and dust that is the birthplace of stars. 7. Where is a globular cluster most likely to be found? Globular ...
... 5. Where is the sun located in the Milky Way? The sun is located about two-thirds of the way between the center and the edge of the galaxy. 6. What is a nebula? A nebula is a large cloud of gas and dust that is the birthplace of stars. 7. Where is a globular cluster most likely to be found? Globular ...
Binocular Objects (MS Word)
... visible with binoculars. M4 Binoculars show this globular cluster as a fuzzy patch while a small telescope will start to show individual stars in a haze. This cluster is one of the nearest and largest of its kind. It lies about 7,000 light away and contains about 10,000 stars when looking to 19th ma ...
... visible with binoculars. M4 Binoculars show this globular cluster as a fuzzy patch while a small telescope will start to show individual stars in a haze. This cluster is one of the nearest and largest of its kind. It lies about 7,000 light away and contains about 10,000 stars when looking to 19th ma ...
Stellar populations
... The locus of stars which have just started to shine • Subgiant branch Stars that have just exhausted H in their cores, and are now moving off the main sequence • Red giants Evolved stars in upper right-hand part of diagram with either He cores, or they are burning He to C and O in their cores. They ...
... The locus of stars which have just started to shine • Subgiant branch Stars that have just exhausted H in their cores, and are now moving off the main sequence • Red giants Evolved stars in upper right-hand part of diagram with either He cores, or they are burning He to C and O in their cores. They ...
THE HERTZSPRUNG-RUSSELL DIAGRAM
... expressed as a colour index, sometimes—especially in old plots—as spectral class), with luminosity decreasing from the top of the plot to the bottom and temperature decreasing from left to right. Note that large magnitudes correspond to small luminosities. 2. Stars on the HR diagram are concentrated ...
... expressed as a colour index, sometimes—especially in old plots—as spectral class), with luminosity decreasing from the top of the plot to the bottom and temperature decreasing from left to right. Note that large magnitudes correspond to small luminosities. 2. Stars on the HR diagram are concentrated ...
The formation of the galaxy is believed to be similar
... The primary reason that massive O-type stars are not found in the galactic halo is because they are a) too massive to be kicked into the halo from the disk. b) so massive that they settle into the thinner disk. c) too short-lived to have persisted from halo formation until today. d) closer to us in ...
... The primary reason that massive O-type stars are not found in the galactic halo is because they are a) too massive to be kicked into the halo from the disk. b) so massive that they settle into the thinner disk. c) too short-lived to have persisted from halo formation until today. d) closer to us in ...
Friday03
... large-scale densities (?) • Galaxy-galaxy interactions are the most likely cause of observed segregation ...
... large-scale densities (?) • Galaxy-galaxy interactions are the most likely cause of observed segregation ...
The Milky Way
... In order to get a good outside view of the Milky Way, you are trying to send a spacecraft high above the plane of the Milky Way, to a height equal to our distance from the Galactic center. If you had a spacecraft that could travel at almost the speed of light, how long would it take it to get there ...
... In order to get a good outside view of the Milky Way, you are trying to send a spacecraft high above the plane of the Milky Way, to a height equal to our distance from the Galactic center. If you had a spacecraft that could travel at almost the speed of light, how long would it take it to get there ...
EvoluGon of high mass stars Solar-‐type stars end their lives by
... These are stars composed almost en=rely of neutrons, with radii ≈ 10 km, leh over aher a core-‐collapse supernova. They are supported against gravita=onal collapse by neutron degeneracy pressure. Their ...
... These are stars composed almost en=rely of neutrons, with radii ≈ 10 km, leh over aher a core-‐collapse supernova. They are supported against gravita=onal collapse by neutron degeneracy pressure. Their ...
BSA Astronomy Merit Badge
... Be gentle. When you are helping a person with hypothermia, handle him or her gently. Limit movements to only those that are necessary. Don't massage or rub the person. Excessive, vigorous or jarring movements may trigger cardiac arrest. Move the person out of the cold. Move the person to a warm, dry ...
... Be gentle. When you are helping a person with hypothermia, handle him or her gently. Limit movements to only those that are necessary. Don't massage or rub the person. Excessive, vigorous or jarring movements may trigger cardiac arrest. Move the person out of the cold. Move the person to a warm, dry ...
the magellanic clouds newsletter - Keele University Astrophysics
... much as 30 kpc and 75 km s−1 . Furthermore, we show that the gravitational pull of the LMC and response of the Milky Way are likely to significantly affect the orbit and phase space distribution of tidal debris from the Sagittarius dwarf galaxy (Sgr). Such effects are larger than previous estimates ...
... much as 30 kpc and 75 km s−1 . Furthermore, we show that the gravitational pull of the LMC and response of the Milky Way are likely to significantly affect the orbit and phase space distribution of tidal debris from the Sagittarius dwarf galaxy (Sgr). Such effects are larger than previous estimates ...
Galaxies Galaxies M81
... Clusters of Galaxies Rather than occurring individually in space, galaxies are grouped in clusters ranging in size from a few dozens to thousands of galaxies. The Coma Cluster, shown at right, is 300 million light years from the Milky Way and contains more than 1,000 (and possibly as many as 10,000 ...
... Clusters of Galaxies Rather than occurring individually in space, galaxies are grouped in clusters ranging in size from a few dozens to thousands of galaxies. The Coma Cluster, shown at right, is 300 million light years from the Milky Way and contains more than 1,000 (and possibly as many as 10,000 ...
Space astrometry 2: Scientific results from Hipparcos
... Eight nearest clusters; both figures from the comprehensive re-reduction of the data (van Leeuwen 2007) ...
... Eight nearest clusters; both figures from the comprehensive re-reduction of the data (van Leeuwen 2007) ...
Life as a Low Mass Red Giant
... just leaving the Main Sequence is called "main sequence turnoff" point. http://www.astro.ubc.ca/~scharein/a311/Sim.html The age of a cluster is just the main sequence lifetime of the stars at the main sequence turnoff • This is about the only way astronomers have to estimate the age of objects outsi ...
... just leaving the Main Sequence is called "main sequence turnoff" point. http://www.astro.ubc.ca/~scharein/a311/Sim.html The age of a cluster is just the main sequence lifetime of the stars at the main sequence turnoff • This is about the only way astronomers have to estimate the age of objects outsi ...
Chapter 15
... the hydrogen fuel in its core to make helium. The helium is basically just sitting there, so it's not producing any energy. Instead, the core is shrinking and getting hotter. Before long, it'll get hot enough to ignite the helium, which will begin fusing together to make heavier elements. When that ...
... the hydrogen fuel in its core to make helium. The helium is basically just sitting there, so it's not producing any energy. Instead, the core is shrinking and getting hotter. Before long, it'll get hot enough to ignite the helium, which will begin fusing together to make heavier elements. When that ...
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 ...
Abundances of RGB stars in NGC 6752 Grundahl
... result of a process other than mixing, i.e., that the present abundance variations are of “primordial” origin. The primordial scenario, and variations on it, has been proposed and discussed several times before in the literature (see for example Cottrell & Da Costa 1981, and Cannon et al. 1998). The ...
... result of a process other than mixing, i.e., that the present abundance variations are of “primordial” origin. The primordial scenario, and variations on it, has been proposed and discussed several times before in the literature (see for example Cottrell & Da Costa 1981, and Cannon et al. 1998). The ...
Abstract book
... Title: Density or mass, which control the early stages of the star formation process? Abstract. How do stellar clusters form is a one of the key questions for understanding the physical mechanisms that drive the transformation of cold molecular gas into stars in different environments. In particular ...
... Title: Density or mass, which control the early stages of the star formation process? Abstract. How do stellar clusters form is a one of the key questions for understanding the physical mechanisms that drive the transformation of cold molecular gas into stars in different environments. In particular ...
Measuring Interstellar Extinction
... 1. Choose which open or globular cluster you will observe. Good targets will be ∼50–500 Myrold open clusters close to the galactic plane. The age range ensures the presence of B and/or A-type stars with near-zero magnitude colors, while the location ensures high amounts of interstellar extinction. O ...
... 1. Choose which open or globular cluster you will observe. Good targets will be ∼50–500 Myrold open clusters close to the galactic plane. The age range ensures the presence of B and/or A-type stars with near-zero magnitude colors, while the location ensures high amounts of interstellar extinction. O ...
December - Rose City Astronomers
... stroke of cosmic serendipity in an area nearly devoid of other major deep-sky objects. The refractor at 44x shows the 12' diameter star cluster as six stars (9th to 11thmagnitude) embedded in a background haze of a half dozen more fainter suns. The Triangulum or Pinwheel Galaxy, also known as M33 (N ...
... stroke of cosmic serendipity in an area nearly devoid of other major deep-sky objects. The refractor at 44x shows the 12' diameter star cluster as six stars (9th to 11thmagnitude) embedded in a background haze of a half dozen more fainter suns. The Triangulum or Pinwheel Galaxy, also known as M33 (N ...
Tyler Gray - Angelfire
... companion of the mass of M32. Very probably, M32 has also suffered from this encounter by losing many stars which are now spread in Andromeda's halo. The brightest of the more than 300 globular clusters of the Andromeda Galaxy M31, G1, is also the most luminous globular in the Local Group of Galaxie ...
... companion of the mass of M32. Very probably, M32 has also suffered from this encounter by losing many stars which are now spread in Andromeda's halo. The brightest of the more than 300 globular clusters of the Andromeda Galaxy M31, G1, is also the most luminous globular in the Local Group of Galaxie ...
Globular cluster
A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes and relatively high stellar densities toward their centers. The name of this category of star cluster is derived from the Latin globulus—a small sphere. A globular cluster is sometimes known more simply as a globular.Globular clusters, which are found in the halo of a galaxy, contain considerably more stars and are much older than the less dense galactic, or open clusters, which are found in the disk. Globular clusters are fairly common; there are about 150 to 158 currently known globular clusters in the Milky Way, with perhaps 10 to 20 more still undiscovered. These globular clusters orbit the Galaxy at radii of 40 kiloparsecs (130,000 light-years) or more. Larger galaxies can have more: Andromeda, for instance, may have as many as 500. Some giant elliptical galaxies, particularly those at the centers of galaxy clusters, such as M87, have as many as 13,000 globular clusters.Every galaxy of sufficient mass in the Local Group has an associated group of globular clusters, and almost every large galaxy surveyed has been found to possess a system of globular clusters. The Sagittarius Dwarf galaxy and the disputed Canis Major Dwarf galaxy appear to be in the process of donating their associated globular clusters (such as Palomar 12) to the Milky Way. This demonstrates how many of this galaxy's globular clusters might have been acquired in the past.Although it appears that globular clusters contain some of the first stars to be produced in the galaxy, their origins and their role in galactic evolution are still unclear. It does appear clear that globular clusters are significantly different from dwarf elliptical galaxies and were formed as part of the star formation of the parent galaxy rather than as a separate galaxy. However, recent conjectures by astronomers suggest that globular clusters and dwarf spheroidals may not be clearly separate and distinct types of objects.