Pre-Lab
... category including gaseous nebulae, planetary nebulae, hazy star clusters, and faint lens-shaped formations. If these objects were nearby, with distances comparable to those of observable stars, they would have to be luminous clouds of gas within our Galaxy. If they were very remote, far beyond the ...
... category including gaseous nebulae, planetary nebulae, hazy star clusters, and faint lens-shaped formations. If these objects were nearby, with distances comparable to those of observable stars, they would have to be luminous clouds of gas within our Galaxy. If they were very remote, far beyond the ...
ASTRO 1050 The Structure of the Milky Way Galaxy
... 3. Now, we know that we live in a Galaxy that has a disk-like shape. But, where in the disk do we live? Are we at the center, or off on one side? In the early 1920s, an American astronomer named Harlow Shapley studied this question. He found that there were clusters of billions of old stars, called ...
... 3. Now, we know that we live in a Galaxy that has a disk-like shape. But, where in the disk do we live? Are we at the center, or off on one side? In the early 1920s, an American astronomer named Harlow Shapley studied this question. He found that there were clusters of billions of old stars, called ...
galaxies, galaxies, galaxies!
... Elliptical galaxies are affectionately called “E” galaxies. They can be extremely large and massive. This galaxy is 2 million light years across. The size of the Milky Way in comparison! ...
... Elliptical galaxies are affectionately called “E” galaxies. They can be extremely large and massive. This galaxy is 2 million light years across. The size of the Milky Way in comparison! ...
Measuring the Milky Way
... These objects are very close to the Galactic center. The orbit on the right is the best fit; it assumes a central black hole of 3.7 million solar masses. ...
... These objects are very close to the Galactic center. The orbit on the right is the best fit; it assumes a central black hole of 3.7 million solar masses. ...
Galaxy Classification
... Elliptical galaxies are affectionately called “E” galaxies. They can be extremely large and massive. This galaxy is 2 million light years across. The size of the Milky Way in comparison! ...
... Elliptical galaxies are affectionately called “E” galaxies. They can be extremely large and massive. This galaxy is 2 million light years across. The size of the Milky Way in comparison! ...
The Size and Structure of the Milky Way Galaxy
... • Stars are a small fraction of the mass of major galaxies • The dark matter problem becomes more pronounced as you go out in the universe • The form of the dark matter is unknown; probably not what you studied in chemistry • Possibly/probably an unknown form of elementary particle ...
... • Stars are a small fraction of the mass of major galaxies • The dark matter problem becomes more pronounced as you go out in the universe • The form of the dark matter is unknown; probably not what you studied in chemistry • Possibly/probably an unknown form of elementary particle ...
The Galaxy Presentation 2011
... •Early 1900’s - Kapteyn used stellar parallax to estimate the true size of the Galaxy Kapteyn Universe •10kpc diameter and 2kpc thick with the Sun less than a kpc from the center (rather heliocentric) •Tried to estimate Rayleigh scattering due to ISM gas but determined it to be insignificant (bec ...
... •Early 1900’s - Kapteyn used stellar parallax to estimate the true size of the Galaxy Kapteyn Universe •10kpc diameter and 2kpc thick with the Sun less than a kpc from the center (rather heliocentric) •Tried to estimate Rayleigh scattering due to ISM gas but determined it to be insignificant (bec ...
or galaxy
... Irregular Galaxies • Irregular Galaxy: not disk-like or ellipsoidal and have no nucleus; chaotic, irregular appearance • They have little symmetry in their shape • Most irregular galaxies were once spiral or elliptical galaxies that have been distorted and deformed by gravitational action from othe ...
... Irregular Galaxies • Irregular Galaxy: not disk-like or ellipsoidal and have no nucleus; chaotic, irregular appearance • They have little symmetry in their shape • Most irregular galaxies were once spiral or elliptical galaxies that have been distorted and deformed by gravitational action from othe ...
Powerpoint
... Type Sa has the largest central bulge, Type Sb is smaller, and Type Sc is the smallest. Type Sa tends to have the most tightly bound spiral arms, with Types Sb and Sc progressively less tight, although the correlation is not perfect. The components of spiral galaxies are the same as in our own Galax ...
... Type Sa has the largest central bulge, Type Sb is smaller, and Type Sc is the smallest. Type Sa tends to have the most tightly bound spiral arms, with Types Sb and Sc progressively less tight, although the correlation is not perfect. The components of spiral galaxies are the same as in our own Galax ...
PHYS 2410 General Astronomy Homework 8
... 29. How does the traditional theory of the formation of the galaxy explain the origin of globular clusters? ...
... 29. How does the traditional theory of the formation of the galaxy explain the origin of globular clusters? ...
lab 11 only - Penn State University
... The celestial sphere is divided up in a system like the \longitude-latitude" system on the Earth's surface. The latitude of an object in the sky is called the declination; an object (like Polaris) whose position is over the Earth's north pole has a declination of +90 degrees; an object over the sout ...
... The celestial sphere is divided up in a system like the \longitude-latitude" system on the Earth's surface. The latitude of an object in the sky is called the declination; an object (like Polaris) whose position is over the Earth's north pole has a declination of +90 degrees; an object over the sout ...
Andromeda Galaxy
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The Andromeda Galaxy (/ænˈdrɒmɨdə/), also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth. It is the nearest major galaxy to the Milky Way and was often referred to as the Great Andromeda Nebula in older texts. It received its name from the area of the sky in which it appears, the constellation of Andromeda, which was named after the mythological princess Andromeda. Being approximately 220,000 light years across, it is the largest galaxy of the Local Group, which also contains the Milky Way, the Triangulum Galaxy, and about 44 other smaller galaxies.The Andromeda Galaxy is the most massive galaxy in the Local Group as well. Despite earlier findings that suggested that the Milky Way contains more dark matter and could be the most massive in the grouping, the 2006 observations by the Spitzer Space Telescope revealed that Andromeda contains one trillion (1012) stars: at least twice the number of stars in the Milky Way, which is estimated to be 200–400 billion.The Andromeda Galaxy is estimated to be 1.5×1012 solar masses, while the mass of the Milky Way is estimated to be 8.5×1011 solar masses. In comparison, a 2009 study estimated that the Milky Way and M31 are about equal in mass, while a 2006 study put the mass of the Milky Way at ~80% of the mass of the Andromeda Galaxy. The Milky Way and Andromeda are expected to collide in 3.75 billion years, eventually merging to form a giant elliptical galaxy or perhaps a large disk galaxy.At 3.4, the apparent magnitude of the Andromeda Galaxy is one of the brightest of any of the Messier objects, making it visible to the naked eye on moonless nights even when viewed from areas with moderate light pollution. Although it appears more than six times as wide as the full Moon when photographed through a larger telescope, only the brighter central region is visible to the naked eye or when viewed using binoculars or a small telescope and would it hence appear to be but another star.