What Are Population Ii Stars

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Population II COSMOS

Details: Stars observed in galaxies were originally divided into two populations by Walter Baade in the 1940s. Although a more refined means of classifying stellar populations has since been established (according to whether they are found in the thin disk, thick disk, halo or bulge of the galaxy), astronomers have continued to coarsely classify stars as either Population I (Pop I) … pop ii star

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Population II Stars StarDate Online

Details: Most Population II stars reside outside the disk, in the galaxy’s halo. Antares and M4 are low in the south at nightfall. Antares shines bright orange. M4 stands close to its right, although you need binoculars to see it — a population of old stars beside a newborn. Script by Damond Benningfield. population i stars

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Population I and II Stars

Details: Populations I and II Stars Stars may be classified by their heavy element abundance, which correlates with their age and the type of galaxy in which they are found. Population I stars include the sun and tend to be luminous, hot and young, concentrated in the disks of spiral galaxies. They are particularly found in the spiral arms. population i

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Population II astronomy Britannica

Details: Other articles where Population II is discussed: Populations I and II: II, in astronomy, two broad classes of stars and stellar assemblages defined in the early 1950s by the German-born astronomer Walter Baade. The members of these stellar populations differ from each other in various ways, most notably in age, chemical composition, and location within galactic… pop 1 and 1

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Populations I and II astronomy Britannica

Details: Population II consists of the oldest stars and clusters, which formed about 1,000,000,000 to 15,000,000,000 years ago. Members of this class presumably were created from interstellar gas clouds that emerged shortly after the big bang, a state of extremely high temperature and density from which the universe is believed to have originated. stellar populations

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Is our sun a population II star? – Colors-NewYork.com

Details: Population I stars include the sun and tend to be luminous, hot and young, concentrated in the disks of spiral galaxies. They are particularly found in the spiral arms. Population II stars tend to be found in globular clusters and the nucleus of a galaxy. pop star 3

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Population III stars: The Universe’s ultimate reclusive

Details: Often in the world of astronomy and astrophysics, unexpected observations lead to new ideas and understanding. However, there are occasionally some models that are built up more traditionally from theories to observational predictions. This is a story of one such model—that of the very first stars in the universe, called, somewhat counterintuitively, … pop ii

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Astronomy Final Flashcards Quizlet

Details: In general, Population I stars are _____ than Population II stars. A) Older B) Younger C) The same age. B. The most circular of the elliptical galaxies are class: A) Ea B) Sb C) E0 D) E7 E) Irr 1. C. A barred-spiral galaxy with a moderate central bulge and uniform spiral arms would be classified as what type of galaxy? A) SBb

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Astronomy Assignment #7 Flashcards Quizlet

Details: A) The bright blue stars that dominate the sky are Population I stars. B) Our Sun is a Population II star. C) Population I stars are the brightest stars in the globular clusters. D) Population I stars lie outside the galactic disc. E) Population II stars probably have terrestrial planets around them.

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Population II stars Article about Population II stars by

Details: If its existence is confirmed, perhaps this locally delayed generation of very-low-metallicity stars should be called Population 0, since Population I stars are metal-rich stars and Population II stars are moderately metal-poor. Each contains about 0.2 percent as much mass as its galaxy's central bulge--the galaxy's spherical or ellipsoidal

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What are the differences between Population I and

Details: Population II stars are older, metal-poor stars found in a galaxy's nuclear bulge, halo, and globular clusters. Also, where are population 2 stars located in the Milky Way? RR Lyrae variable stars and other Population II stars are found in the halos of spiral galaxies and in the globular clusters of the Milky Way system.

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Department of Astronomy: Introductory Astronomy

Details: Stars are generally classed into two main groups called Population Iand Population II.The stars of the two populations are very similar. They all burn elements through fusion in the same way and follow the same evolution sequence.However, there are important differences in their characteristics which distinguish the two groups; one of the main …

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Population II star - Everything2.com

Details: Population II stars are metal poor stars, containing about 0.1% metals. These stars can be found in the spherical portion of the galaxy (the halo and the bulge).Often these stars have tipped and elliptical orbits. These stars are relatively old, aged from 2 - …

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Population II Stars - NASA/ADS - Harvard University

Details: Old red stars that occur throughout elliptical and lenticular galaxies, and in the haloes, globular clusters and central bulges of spiral galaxies. They differ from Population I stars in having a very low metal content, and those heavier elements that they do contain are thought to have been produced by massive, short-lived earlier stars which form a hypothetical Population III. …

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Population II star Tardis Fandom

Details: Population II stars were a type of star younger than Population III stars. ( PROSE: The Infinity Doctors ) The Sixth Doctor claimed that human life was made from the remnants of Population II stars, which he called "star-stuff". ( PROSE: The Quantum Archangel ) Community content is available under CC-BY-SA unless otherwise noted.

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Stellar Classification: Populations I and II - 550 Words

Details: Star metallicities range from 10 percent to 300 percent of the Sun metallicity for Population I stars and from 0.1 percent to 10 percent of the solar value for Population II stars (COSMOS). Star populations with negligible abundances of metals are referred to as Population III stars. Given that stars’ properties can be placed on a continuum

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The First Stars in the Universe - Scientific American

Details: The young metal-rich stars in the Milky Way are called Population I stars, and the old metal-poor stars are called Population II stars; following this terminology, the stars with no metals at all

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* Population II (Astronomy) - Definition - Online Encyclopedia

Details: Population II. ~[ ⇑]: A classification of stars poor in atoms heavier than helium; these are relatively old stars found in the halo, globular cluster s, or the nuclear bulge. Stars poor in atoms heavier than helium; nearly always relatively old stars found in …

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Population III COSMOS

Details: Stars observed in galaxies were originally divided into two populations by Walter Baade in the 1940s. Although a more refined means of classifying stellar populations has since been established (according to whether they are found in the thin disk, thick disk, halo or bulge of the galaxy), astronomers have continued to coarsely classify stars as either Population I (Pop I, …

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Types of Stars - Population I, II and III Stars And Their

Details: Hello and welcome to What Da Math!In this video, we will talk about various populations of stars.Patreon page:https://www.patreon.com/user?u=2318196&ty=hEnjo

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How old are population 2stars?

Details: Extreme Population II stars (the most metal poor) are found in the halo and the globular clusters; these are the oldest stars.. Keeping this in view, what is the difference between population 1 and 2 stars? Population I stars include the sun and tend to be luminous, hot and young, concentrated in the disks of spiral galaxies.

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galaxies - Population I and II stars - Physics Stack Exchange

Details: I) in the disk, and older (Pop. II) stars in the Halo. This does not mean there are no stars from the opposite populations mixed in. To my knowledge, the distribution of stars and their ages is completely consistent with population synthesis simulations, and there don't seem to be an excess of 'missing' Pop. II stars from the disk.

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Population I and Population II Stars - Video & Lesson

Details: Population II stars are older, metal-poor stars found in a galaxy's nuclear bulge, halo, and globular clusters. Now, don't get too excited about finding a …

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- Population III Stars and the Big Bang Model

Details: Population II stars, containing only 0.1% metal content in their light spectra, are observed around a galaxy halo, in globular clusters, and in the central bulge of a galaxy. These designations became apparent from the stars' locations in the …

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What is the distribution of Population I and II stars in

Details: Population II stars are more spherically distributed around the Galaxy, whilst population I stars are concentrated in the Galactic plane, where the Sun is. However, the bulge stars, whilst metal-rich are also probably very old - so do you include those? There is also an intermediate "thick disk" population with intermediate metallicities that

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population II stars Witness This

Details: Population II stars were smaller but slightly hotter than the stars we know today. Their metal contents gradually started to increase. Their metal contents gradually started to increase. However, there is a mystery, explains de Bruyn.

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Population II Stars. Part 2: Semi-theoretical (B-V) - T e

Details: The maximum deviation of the extreme population II stars (Z=0) from the standard (B-V)-T_e relation increases from 0.10 mag at T_e=7000 to 0.25 mag at T_e=5000. These results are compared with the observed positions of the subdwarfs in the M_v-(B-V) plane.

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11 Population II stars than population I stars A have

Details: 11 population ii stars than population i stars a have. This preview shows page 2 - 5 out of 14 pages. [11] Population II stars ____ than population I stars. A) have higher percentages of hydrogen and helium B) sparkle more C) give off more blue light. D) are younger. [12] The average temperature at the surface of Venus is SUBSTANTIALLY greater

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25.5 Stellar Populations in the Galaxy - Astronomy OpenStax

Details: Population II stars in the outer galactic halo and in globular clusters have much lower abundances of the heavy elements—often less than one-hundredth the concentrations found in the Sun and in rare cases even lower. The oldest population II star discovered to date has less than one ten-millionth as much iron as the Sun, for example.

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Metallicity - Wikipedia

Details: At a given mass and age, a metal-poor star will be slightly warmer. Population II stars' metallicities are roughly 1/1000 to 1/10 of the Sun's ([Z/H] = −3.0 to −1.0), but the group appears cooler than Population I overall, as heavy Population II stars have long since died.

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Population 1 Is A Type Of Star.

Details: Population II or metal-poor stars are those with relatively little metal. The idea of a "relatively" small amount must be kept in mind because even metal-rich objects contain very small amounts of any element other than hydrogen and helium; metals make up only a small percentage of the chemical make up of the universe, even 13.7 billion years

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Colors of Other Objects

Details: Astronomers call the stars in the galactic planes "Population I" stars and stars outside galactic planes "Population II" stars. Population II stars are older and redder than Population I stars. If you repeated your diagram from Explore 7 and 8 with Population I stars instead, you would see more stars lying along the main trend.

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Metallicity Space Wiki Fandom

Details: The globular cluster M80.Stars in globular clusters are mainly older metal-poor members of Population II. In astronomy and physical cosmology, the metallicity of an object is the proportion of its matter made up of chemical elements other than hydrogen and helium. (This terminology is in disaccord what chemistry regards as metals).Since on the grandest of scales the universe is …

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Have Population III stars been discovered - creation.com

Details: Population I and II stars were historically first identified in our galaxy. Population I stars are found predominantly in the spiral disk of the galaxy and Population II stars are found above and below the disk. They have other distinguishing features also but their metal content is the major distinguishing feature.

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Some aspects of population II star formation (Journal

Details: A discussion is given of various features of the population II star-formation process associated with the low heavy-element abundance in primordial matter. Radiation pressure in the Ly-..cap alpha.. line will play the decisive role, causing rapid and efficient fragmentation and a repulsion of the outer part of the protostar.

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Cosmology, Population III

Details: The best evidence for a distinct population of stars would be a lower cutoff in the metallicity distribution of Population II stars. If the first stars had the same IMF as today, with a lower cutoff at about 0.1 M , one might expect stars smaller than 0.8 M (whose lifetime exceeds the age of the Universe) to display arbitrarily low metallicity.

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Population II stars Archives - ExtremeTech

Details: Population II stars; Population II stars. The Universe’s First Supernovae May Have Been Powerful, Asymmetric Jets May 9, 2019 at 9:21 am Astronomers have discovered an ancient Population II star

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Quiz & Worksheet - Population I and Population II Stars

Details: Print. Population I and Population II Stars. Worksheet. 1. Low-mass stars live much longer than intermediate-mass or high-mass stars. Therefore, you would expect low mass stars in …

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Stellar Populations Encyclopedia.com

Details: Population II stars zip along at velocities ranging up to 45 mi (75 km) per second in the most extreme cases. Other populations. Like most initial classifications, the division of stars into Population I and Population II stars is a bit of an oversimplification.

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(PDF) The Evolution of Population II Stars

Details: Evolution of 1.2 M⊙ Population II stars in the helium-burning phase is investigated, taking into account the effect of conversion of helium into carbon and oxygen both on the mean molecular

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Interstellar Medium and the Milky Way

Details: The Population I are said to be ``metal-rich'' in comparison to the Population II stars. There is a continuum of the metal abundance and orbit shapes. The oldest Population I stars have 0.1 times the metal abundance of the Sun and have slightly elliptical orbits that can take them up to 3000 light years from the disk plane.

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The Milky Way Galaxy - University of Oregon

Details: Population I and population II stars appear in different regions. Dark matter makes up a large fraction of the matter in the Milky Way. We cannot see the center of the Milky Way with visible light, but infrared, radio, x-rays, and gamma-rays reveal its features.

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【托福考满分ETS阅读官方真题】托福Official 50 Passage 3阅读真 …

Details: When Population II stars die, their material is spread out into space. Some of this dust is eventually incorporated into newly formed Population I stars. Though Population I stars consist mostly of hydrogen and helium gas, they also contain heavy elements (heavier than helium), which comprise about 1 or 2 percent of their mass.

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Have Astronomers Finally Found Population III Stars

Details: Therefore, Population II (metal poor) stars are older, and Population I (metal rich) stars are younger. However, there is a problem with this understanding. Extreme Population II stars—those stars deemed to be the oldest—contain some metals. Because the big bang model does not produce metals, the very first generation of stars ought not to

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The Type of the Milky Way - University of Arizona

Details: Population II is the older stars that tend to lie around the center and in globular clusters, and hence have orbits that take them well out of the disk/plane. Many of these stars were among the first to form, and hence they tend to be almost pure hydrogen and helium, not enriched by previous generations of stars because there were no previous generations.

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