Integrative Studies 410 Our Place in the Universe
... • may contain millions of stars • Old stars • Great tool to study stellar life cycle ...
... • may contain millions of stars • Old stars • Great tool to study stellar life cycle ...
PHYSICS 015
... For the most massive stars, the Schwarzschild radius is already too big. For example, if you wanted to allow a 10-solar-mass star to settle down as a neutron star, about 10 km in diameter, it already inside its Schwarzschild radius and is doomed to collapse! Stars can’t ‘know’ that they should shed ...
... For the most massive stars, the Schwarzschild radius is already too big. For example, if you wanted to allow a 10-solar-mass star to settle down as a neutron star, about 10 km in diameter, it already inside its Schwarzschild radius and is doomed to collapse! Stars can’t ‘know’ that they should shed ...
Early Spring Observing – Millstone News Night Sky
... The Beehive contains a larger star population than most other nearby clusters. Under dark skies the Beehive Cluster looks like a nebulous object to the naked eye; thus it has been known since ancient times. We often find it, rather than the constellation it is found in (Cancer). From Wikipedia: The ...
... The Beehive contains a larger star population than most other nearby clusters. Under dark skies the Beehive Cluster looks like a nebulous object to the naked eye; thus it has been known since ancient times. We often find it, rather than the constellation it is found in (Cancer). From Wikipedia: The ...
The Milky Way
... • How many trips of Sun around Milky Way? R = 8.5 kpc V = 220km/s P = 2.5x108 yrs ...
... • How many trips of Sun around Milky Way? R = 8.5 kpc V = 220km/s P = 2.5x108 yrs ...
Formation of Globular Clusters: In and Out of Dwarf Galaxies
... • Globular clusters may form in giant molecular clouds in progenitor galaxies at intermediate redshifts • Model explains observed sizes, masses, ages, metallicities • Dynamical evolution explains the present mass function and may be important for metallicity bimodality • Red clusters in the Galaxy a ...
... • Globular clusters may form in giant molecular clouds in progenitor galaxies at intermediate redshifts • Model explains observed sizes, masses, ages, metallicities • Dynamical evolution explains the present mass function and may be important for metallicity bimodality • Red clusters in the Galaxy a ...
Astronomy 104: Homework Set 5 Due: Monday, March 16, 2015
... b) In a log-log plot like the one you produced, a straight light implies a power-law profile. Do the data for each of the density laws you plotted follow a straight line? c) Determine the slope of the line that best fits each of the two density profiles. Keeping in mind that the Bulge of our Galaxy ...
... b) In a log-log plot like the one you produced, a straight light implies a power-law profile. Do the data for each of the density laws you plotted follow a straight line? c) Determine the slope of the line that best fits each of the two density profiles. Keeping in mind that the Bulge of our Galaxy ...
THE MILKY WAY GALAXY
... disk, from our perspective more stars are visible looking through the disk then are seen looking away from the disk. The nature and size of the Galaxy, as well as our location within this stellar system were finally appreciated in the early 20th century when: The locations of the globular clusters ...
... disk, from our perspective more stars are visible looking through the disk then are seen looking away from the disk. The nature and size of the Galaxy, as well as our location within this stellar system were finally appreciated in the early 20th century when: The locations of the globular clusters ...
Day-6
... The Sun contains more than 99.85% of the total mass of the solar system If you put all the planets in the solar system, they would not fill up the volume of the Sun 110 Earths or 10 Jupiters fit across the diameter of the Sun ...
... The Sun contains more than 99.85% of the total mass of the solar system If you put all the planets in the solar system, they would not fill up the volume of the Sun 110 Earths or 10 Jupiters fit across the diameter of the Sun ...
mass per nucleon
... The Age of the Universe Stars in the oldest clusters have ages of 10-15 billion years From the expansion rate of the universe, we can estimate the time since the Big Bang. Current values are around 13 billion years. Are there stars older than the Universe??? ...
... The Age of the Universe Stars in the oldest clusters have ages of 10-15 billion years From the expansion rate of the universe, we can estimate the time since the Big Bang. Current values are around 13 billion years. Are there stars older than the Universe??? ...
A-105 Homework 1
... 18. (2 pts.) If the true distance to the center of our galaxy is found to be 7 kpc (instead of 8.5 kpc) and the orbital velocity of the sun is 220 km/s, what is the minimum mass of the galaxy? (Hints: Find the orbital period of the sun at 7 kpc, and then use Kepler’s 3rd law.) ...
... 18. (2 pts.) If the true distance to the center of our galaxy is found to be 7 kpc (instead of 8.5 kpc) and the orbital velocity of the sun is 220 km/s, what is the minimum mass of the galaxy? (Hints: Find the orbital period of the sun at 7 kpc, and then use Kepler’s 3rd law.) ...
Maui Stargazing April Observing List DEEP SPACE OBJECTS
... of ionized gas ejected from old red giant stars late in their lives. GLOBULAR STAR CLUSTERS 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 hi ...
... of ionized gas ejected from old red giant stars late in their lives. GLOBULAR STAR CLUSTERS 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 hi ...
Goal: To understand clusters of stars
... • As viewed from Earth you tend to see the blue high mass stars. • Those are always young stars as they don’t last long. • These are clusters with stars of equal age, distance, and composition, but range in mass. ...
... • As viewed from Earth you tend to see the blue high mass stars. • Those are always young stars as they don’t last long. • These are clusters with stars of equal age, distance, and composition, but range in mass. ...
Goal: To understand clusters of stars
... • As viewed from Earth you tend to see the blue high mass stars. • Those are always young stars as they don’t last long. • These are clusters with stars of equal age, distance, and composition, but range in mass. ...
... • As viewed from Earth you tend to see the blue high mass stars. • Those are always young stars as they don’t last long. • These are clusters with stars of equal age, distance, and composition, but range in mass. ...
Handout from Allaire Star Party
... stars excites the gas in the nebula and causes it to glow; hence the name “emission nebula”. Emission nebulae are mostly red due to the fact that their major component is hydrogen, which glows reddish-pink when excited. Other types of nebulae are “dark” nebulae, made of dust that obscures the light ...
... stars excites the gas in the nebula and causes it to glow; hence the name “emission nebula”. Emission nebulae are mostly red due to the fact that their major component is hydrogen, which glows reddish-pink when excited. Other types of nebulae are “dark” nebulae, made of dust that obscures the light ...
The Milky Way Galaxy
... Shapley’s model Globular clusters must orbit around the center of mass of the galaxy! Thus, assuming the clusters are distributed uniformly around the galaxy, he measured the 3D distribution of clusters (using Cepheid variables) and then assumed that the center of that distribution was where the cen ...
... Shapley’s model Globular clusters must orbit around the center of mass of the galaxy! Thus, assuming the clusters are distributed uniformly around the galaxy, he measured the 3D distribution of clusters (using Cepheid variables) and then assumed that the center of that distribution was where the cen ...
Was kann man von offenen Sternhaufen lernen?
... Star clusters are physically related groups of stars held together by mutual gravitational attraction. The number of all star clusters in the Milky Way is about 10 000 but only 3000 in catalogues. From these, about 170 Globular Clusters (“old”). ...
... Star clusters are physically related groups of stars held together by mutual gravitational attraction. The number of all star clusters in the Milky Way is about 10 000 but only 3000 in catalogues. From these, about 170 Globular Clusters (“old”). ...
Star Clusters and their stars
... clusters orbiting our Galaxy. They typically have 105 – 106 stars. They are spherically distributed around the center of our Galaxy. They tend to concentrate towards the center of the Galaxy, with many in the constellations Sagittarius, Scorpio and Ophiunchus It was by studying the distribution of g ...
... clusters orbiting our Galaxy. They typically have 105 – 106 stars. They are spherically distributed around the center of our Galaxy. They tend to concentrate towards the center of the Galaxy, with many in the constellations Sagittarius, Scorpio and Ophiunchus It was by studying the distribution of g ...
Star_Clusters
... clusters orbiting our Galaxy. They typically have 105 – 106 stars. They are spherically distributed around the center of our Galaxy. They tend to concentrate towards the center of the Galaxy, with many in the constellations Sagittarius, Scorpio and Ophiunchus It was by studying the distribution of g ...
... clusters orbiting our Galaxy. They typically have 105 – 106 stars. They are spherically distributed around the center of our Galaxy. They tend to concentrate towards the center of the Galaxy, with many in the constellations Sagittarius, Scorpio and Ophiunchus It was by studying the distribution of g ...
WEBDA - a tool for CP star research in open clusters
... all located at approximately the same heliocentric distance. They are believed to originate from large cosmic gas and dust clouds (diffuse nebulae) in the Milky Way, and to continue to orbit the galaxy through the disk. Hence, star clusters are of great interest for scientists because the stellar me ...
... all located at approximately the same heliocentric distance. They are believed to originate from large cosmic gas and dust clouds (diffuse nebulae) in the Milky Way, and to continue to orbit the galaxy through the disk. Hence, star clusters are of great interest for scientists because the stellar me ...
Lecture 10: The Milky Way
... This gives us the absolute luminosities of low-mass stars, and using binary systems we can calibrate our models to true masses and radii (see earlier). The trouble is that within 100pc we have no massive stars and only 4 giants – how do we calibrate these? To get distances to objects further away we ...
... This gives us the absolute luminosities of low-mass stars, and using binary systems we can calibrate our models to true masses and radii (see earlier). The trouble is that within 100pc we have no massive stars and only 4 giants – how do we calibrate these? To get distances to objects further away we ...
ASTRO 1050 The Structure of the Milky Way Galaxy
... 7. Now if we assume that the entire Universe has a finite age, the Universe has to be at least as old as M55, and is probably older. Lets assume that M55 formed about a billion years after the Universe formed. From the information given, what is your estimate for the age of the Universe? Does this n ...
... 7. Now if we assume that the entire Universe has a finite age, the Universe has to be at least as old as M55, and is probably older. Lets assume that M55 formed about a billion years after the Universe formed. From the information given, what is your estimate for the age of the Universe? Does this n ...
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.