Population I stars are relatively young stars which have formed within the last few billion years. Extreme Population I stars (the most metal rich stars) are found only in the spiral arms; these are the youngest stars. … Population II stars are metal poor stars; they contain about 0.1 percent metals.
What is the difference between population I stars and Population II stars describe each and identify their differences quizlet?
Population I stars are usually the blue younger stars. They orbit in the disk and they are relatively rich in metals. Population II stars are the red, older stars that lies in the bulge and halo of the Galaxy.
What are population 1 stars in the galaxy?
Population I consists of younger stars, clusters, and associations—i.e., those that formed about 1,000,000 to 100,000,000 years ago. Certain stars, such as the very hot, blue-white O and B types (some of which are less than 1,000,000 years old), are designated as extreme Population I objects.
What is the difference between a population I II and III star?
By definition, each population group shows the trend where decreasing metal content indicates increasing age of stars. Hence, the first stars in the universe (very low metal content) were deemed Population III, old stars (low metallicity) as Population II, and recent stars (high metallicity) as Population I.What is the difference between a population 1 and Population II stars in what sense can the stars of one population be regarded as the children of the other population?
Population I stars are enriched in heavy elements (metals) compared to Population II stars. Population I stars can be considered to be the “children” of the older Population II stars because it was in the Population II stars, which have long since lived and died, that the heavy elements were manufactured.
What is the difference between stars in spiral arms and globular clusters quizlet?
The spiral arms contain many hot young stars and therefore is luminous. … The clusters found in the halo are globular clusters (approximately 100 of them), so the halo is population II, and contains very old stars.
Why do we think Population II don't have any heavy metals?
Since light metals are produced primarily in Type II supernova explosions (the explosions of massive stars which have lifetimes of only a few million years), while the heavier elements can only be produced in Type Ia supernova explosions (the explosion of a much older white dwarf in a binary system), the relative lack …
What population of stars does the sun belong to quizlet?
Terms in this set (60) What population of stars does the Sun belong to? a. The Sun is a metal-poor Population II star.What is the difference between OB associations and globular clusters?
The shape (which we get from the names), The ages of the stars in them. Globular clusters are filled with old stars – some are even old cores of galaxies that were cannibalized by our Milky Way, whereas Open clusters are filled with young stars that were born in a nebula and have drifted apart, and.
What distinguishes the different stellar populations in our galaxy?We now know that the populations differ not only in their locations in the Galaxy, but also in their chemical composition, age, and orbital motions around the center of the Galaxy.
Article first time published onIs sun a third generation star?
Our Sun, by any metric, is at least a third-generation star, but is probably made up of a variety of materials that have existed in multiple generations of stars of unequal properties.
How many stars are in elliptical galaxies?
But ellipticals can also stretch to more than a million light-years across, and contain more than ten trillion stars.
What is a Type 3 star?
Population III (Pop III) stars are composed entirely of primordial gas – hydrogen, helium and very small amounts of lithium and beryllium. … These Pop III stars would then produce the metals observed in Pop II stars and initiate the gradual increase in metallicity across subsequent generations of stars.
Why are population I stars metal rich and Population II stars metal poor?
Population I stars are younger stars found in the disk of the galaxy that contain lots of atoms heavier than helium (metals). Population II stars are older, metal-poor stars found in a galaxy’s nuclear bulge, halo, and globular clusters.
How many galaxies are there?
Currently, in 2020, it was estimated that there are around 2 trillion galaxies in the observable Universe. Each galaxy is unique, ranging in size from 10,000 light-years to hundreds of light-years.
Which of the following is not true about Population I stars?
What is not true of Population I stars? They are old. We can see it in dark clouds and clouds that absorb light. The matter creates narrow absorption lines in the spectra of some stars.
Which is the biggest star of our solar system?
ANSWER: The largest star, and indeed the only star in our solar system, is the sun. The sun is a bit under a million miles across. About 110 Earths put side by side would equal the size of the sun. The sun has 99.8 percent of the mass of our solar system.
Why do some quasars have redshifts greater than 1?
Why do some quasars have red shifts greater than 1? They are very distant, with relativistic red shifts that take into account dilation of space-time, as Einstein predicted.
Is there a black hole in the Milky Way?
The Milky Way’s supermassive black hole, known as Sagittarius A* (Sgr A*), is over 4 million times more massive than our sun. Its strong gravitational pull draws nearby stars and gas clouds into its accretion disk.
How old is our galaxy?
Astronomers believe the Milky Way is about 13.6 billion years old — only 200 million years younger than the universe. The galaxy’s evolution began when clouds of gas and dust started collapsing, pushed together by gravity.
Which of the following is not a difference between spiral and elliptical galaxies?
Which of the following is NOT a difference between spiral and elliptical galaxies?” Your answer : Spiral galaxies are younger, whereas elliptical galaxies are older. Correct! While spiral galaxies contain younger stars, they also contain older stars.
What are differences between open star clusters and globular star clusters?
Globular clusters are old clusters of stars that have remained in a gravitationally bound system. … Open clusters are much younger and smaller than globular clusters. They are the recent birthplaces of new stars, which form out of clouds of dust and gas, and contain only hundreds or thousands of stars.
What is the difference between an E0 and an E7 galaxy?
What is the difference between an E0 and an E7 galaxy? The E7 has an oval shape and the E0 is circular. What category do astronomers use if a galaxy does not fit into the spiral or elliptical category? Irregular.
What color are the star clusters in the spiral arms and what does that mean quizlet?
What color are the star clusters in the spiral arms and what does that mean? The RED regions contain only old stars. The younger ones have ended their lives. And the BLUE regions contain both young and old stars and the young, more luminous ones dominate the light.
What is the difference between the different types of star clusters?
Two main types of star clusters can be distinguished: globular clusters are tight groups of hundreds to millions of old stars which are gravitationally bound, while open clusters are more loosely clustered groups of stars, generally containing fewer than a few hundred members, and are often very young.
What is the difference between a star cluster and a star association?
Stellar agglomerates for which the age of the stars exceeds the crossing time are bound, and are referred to as star clusters. Alternatively, those for which the crossing time exceeds the stellar age are unbound and are referred to as associations.
How are do globular clusters differ from open clusters quizlet?
open clusters contain up to several thousand stars and are found in the disk of the galaxy. Globular clusters contain thousands of stars, all closely packed together. They are found mainly in the halo of the galaxy.
Which type of galaxy contains the most Population II stars?
In fact, elliptical galaxies contain primarily old, red stars (also known as Population II stars). Elliptical galaxies vary widely in size. Both the largest and the smallest known galaxies are elliptical. Very large elliptical galaxies can reach 300 million light years in diameter.
How old is the oldest planet?
DiscoveryEccentricitylowOrbital period36,525 d ~100 yInclination55StarPSR B1620-26 AB
How far away is the closest star to the sun?
Proxima Centauri is a small, low-mass star located 4.2465 light-years (1.3020 pc) away from the Sun in the southern constellation of Centaurus. Its Latin name means the ‘nearest [star] of Centaurus’. It was discovered in 1915 by Robert Innes and is the nearest-known star to the Sun.
What is the difference between population I stars and Population II stars?
Population I stars are relatively young stars which have formed within the last few billion years. Extreme Population I stars (the most metal rich stars) are found only in the spiral arms; these are the youngest stars. … Population II stars are metal poor stars; they contain about 0.1 percent metals.
