Where are population 2 stars located in the Milky Way?
Where are population 2 stars located in the Milky Way?
bulge
Population II stars are mainly found in the bulge and halo of galaxies.
Where are the population I stars located in the Galaxy?
disk
Population I stars are metal rich stars; they contain about 2-3 percent metals. They are found in the disk of the Galaxy. They travel on circular orbits about the center of the Galaxy and generally remain in the plane of the Galaxy as they orbit.
What is the population of Milky Way Galaxy?
Variation of star density with z distances
| Stellar populations | ||
|---|---|---|
| Population I | ||
| distribution | extremely patchy; spiral arms | patchy; spiral arms |
| age (109 years) | 0.1 | 0.1–1.5 |
| total mass (109 suns) | 2 | 5 |
What are population 2 stars quizlet?
population II stars. stars poor in atoms heavier than helium ; relatively old stars nearly always found in the halo, globular clusters, or the central bulge. population I stars. stars with significant amounts of atoms heavier than helium; relatively young stars nearly always found in the galactic disk.
How old is the Galaxy?
13.51 billion years
Milky Way/Age
Astronomers believe that our own Milky Way galaxy is approximately 13.6 billion years old. The newest galaxy we know of formed only about 500 million years ago.
What is the fastest moving star in our night sky?
In the center of our Milky Way galaxy, scientists have spotted the fastest star ever detected, moving at more than 8% of the speed of light. Our galaxy’s center features the supermassive black hole Sagittarius A* (Sgr A*), which is as massive as about 4 million suns.
How old is the galaxy?
Which kind of star is most likely to be part of the spheroidal population?
Cards
| Term Stars that orbit on nearly the same plane | Definition disk stars |
|---|---|
| Term Which kind of star is most likely to be part of the spheroidal population? | Definition an M star |
| Term We measure the mass of the black hole at the galactic center from: | Definition the orbits of stars in the galactic center. |
Why is 250 million a cosmic year?
The planets in our solar system orbit around the sun. Even at this blazing speed, it takes the sun approximately 225-250 million years to complete one journey around the galaxy’s center. This amount of time – the time it takes us to orbit the center of the galaxy – is sometimes called a cosmic year.
What happens when two spiral galaxies collide?
A: When two spiral galaxies collide, gravity is the main force that comes into play. As the galaxies approach each other, gravitational forces start to pull the stars, gas, and dust of the spiral arms out of their original orbits. During the merger, the stars become scattered and their orbits become random.
Is the Milky Way spiral shaped?
Our Milky Way galaxy has an elegant spiral shape with long arms filled with stars, but exactly how it took this form has long puzzled scientists. New observations of another galaxy are shedding light on how spiral-shaped galaxies like our own get their iconic shape.
Where are population I and Population II stars found?
With the model of heavy element formationin supernovae, this suggests that the gas from which they formed had been seeded with the heavy elements formed from previous giant stars. About 2% of the total belong to Population I. Population II stars tend to be found in globular clusters and the nucleus of a galaxy.
Where are intermediate population 2 stars found in the Milky Way?
Intermediate Population II stars are common in the bulge near the centre of the Milky Way, whereas Population II stars found in the galactic halo are older and thus more metal-poor. Globular clusters also contain high numbers of population II stars.
Which is larger population I or population II?
…larger class of stars called Population II (older stars found mainly in the galactic core and halo). Another group, that of variables with periods of a year or more, mostly belong to Population I (younger stars found generally in the spiral arms of a galaxy).
Which is an example of a stellar population?
Examples are bright supergiant stars, main-sequence stars of high luminosity (spectral classes O and B), which are concentrated in the spiral arms, and members of young open star clusters. Interstellar matter and molecular clouds are found in the same places as population I stars.