Astronomy 114 Problem Set # 7 Due: 30 Apr 2007 SOLUTIONS 1
... we derived earlier.] This mass is much larger than determined from the luminous matter, so there should be a lot of invisible “dark” mass in the NGC 4378. ...
... we derived earlier.] This mass is much larger than determined from the luminous matter, so there should be a lot of invisible “dark” mass in the NGC 4378. ...
11.3 Measuring Distances in Space
... Determining Distances by Triangulation The distance to a far away object can be determined by measuring two angles and the distance between those two angles. A line (called a baseline) is laid out and angle measurements are taken at the baseline endpoints to the distant object. Geometry and Trigono ...
... Determining Distances by Triangulation The distance to a far away object can be determined by measuring two angles and the distance between those two angles. A line (called a baseline) is laid out and angle measurements are taken at the baseline endpoints to the distant object. Geometry and Trigono ...
The Milky Way is on a collision course with its neighbor, the
... our galaxy experiences its gravitational dance with Andromeda. Because only a small fraction of a galaxy’s mass ends up in tidal tails, it is more likely the Sun will go for a much less dramatic ride. Most of the stars in merging galaxies remain relatively close to their host galaxies. The chance of ...
... our galaxy experiences its gravitational dance with Andromeda. Because only a small fraction of a galaxy’s mass ends up in tidal tails, it is more likely the Sun will go for a much less dramatic ride. Most of the stars in merging galaxies remain relatively close to their host galaxies. The chance of ...
Announcements Our Milky Way Galaxy March 30 −
... • Galaxies are made primarily of matter that does not emit light. • This matter is not protons & neutrons, or electrons. This is called dark matter. ...
... • Galaxies are made primarily of matter that does not emit light. • This matter is not protons & neutrons, or electrons. This is called dark matter. ...
Build your own Galaxy - McDonald Observatory
... oven cooks food by emitting strong radio waves, called microwaves, at a 12-centimeter wavelength). Astronomers have detected hydrogen far beyond the luminous stars of our galaxy. In your model, the hydrogen clouds would extend an additional nine centimeters from the edge of the disk. In real space, ...
... oven cooks food by emitting strong radio waves, called microwaves, at a 12-centimeter wavelength). Astronomers have detected hydrogen far beyond the luminous stars of our galaxy. In your model, the hydrogen clouds would extend an additional nine centimeters from the edge of the disk. In real space, ...
1apr
... galaxy? The top image shows the optical discovery image of this massive nearby galaxy – most of its structure is not discernible. The bottom image is the GALEX data. Voila – there is really a galaxy there. There is no hint at the LSB nature of this galaxy in the GALEX image and the ratio of UV emiss ...
... galaxy? The top image shows the optical discovery image of this massive nearby galaxy – most of its structure is not discernible. The bottom image is the GALEX data. Voila – there is really a galaxy there. There is no hint at the LSB nature of this galaxy in the GALEX image and the ratio of UV emiss ...
Galaxies
... This is M31, the Andromeda galaxy. The light has taken 2.2 million years to get to us and is 200,000 light years across! It was named ‘little cloud’ by the Persian astronomer Abdal-Rahman-al-Sufi in 964 AD and is one of the local group of galaxies. ...
... This is M31, the Andromeda galaxy. The light has taken 2.2 million years to get to us and is 200,000 light years across! It was named ‘little cloud’ by the Persian astronomer Abdal-Rahman-al-Sufi in 964 AD and is one of the local group of galaxies. ...
Homework #1 Questions
... Homework #1 Questions These questions are found at the end of the appropriate units of the textbook, “Pathways to Astronomy: Volume 2 Stars & Galaxies,” by Scneider and Arny. ...
... Homework #1 Questions These questions are found at the end of the appropriate units of the textbook, “Pathways to Astronomy: Volume 2 Stars & Galaxies,” by Scneider and Arny. ...
2. A giant hand took one of the planets discovered
... Brightest stars 10,000 L Brightest globular clusters 100,000 L Brightest H II regions 100,000 L Etc. Î can now measure distances to more distant galaxies ...
... Brightest stars 10,000 L Brightest globular clusters 100,000 L Brightest H II regions 100,000 L Etc. Î can now measure distances to more distant galaxies ...
Intro to Astronomy Power Point
... Spiral galaxies are so-named because of the graceful shapes of arms emanating from a bright central nucleus. Spirals are classified according to how tightly or loosely wound the arms are, and it turns out that the brightness of the central nucleus is correlated to the tightness of the arm. The galax ...
... Spiral galaxies are so-named because of the graceful shapes of arms emanating from a bright central nucleus. Spirals are classified according to how tightly or loosely wound the arms are, and it turns out that the brightness of the central nucleus is correlated to the tightness of the arm. The galax ...
Document
... I. Select bright objects that you can see throughout the Milky Way and trace their directions and distances II. Observe objects at wavelengths other than visible (to eliminate problems caused by dust, gas, other galactic bodies, etc), and catalogue their directions and distances ...
... I. Select bright objects that you can see throughout the Milky Way and trace their directions and distances II. Observe objects at wavelengths other than visible (to eliminate problems caused by dust, gas, other galactic bodies, etc), and catalogue their directions and distances ...
Chapter 14 The Milky Way Galaxy
... 14.6 The Mass of the Milky Way Galaxy The orbital speed of an object depends only on the amount of mass between it and the galactic center. ...
... 14.6 The Mass of the Milky Way Galaxy The orbital speed of an object depends only on the amount of mass between it and the galactic center. ...
Galaxies - C. Levesque
... this creates a black hole • A black hole is an object so dense that not even light can escape it. • We can find black holes by looking for objects in space ...
... this creates a black hole • A black hole is an object so dense that not even light can escape it. • We can find black holes by looking for objects in space ...
document
... the Apis-bulls and couldn’t believe what they had found. Leading to the tomb was a paved avenue lined by lions that were carved out of stone. To enter the tomb they had to walk through a long and high arched narrow passageway cut into the rock. It extended for about 2,000 feet and was only 20 feet w ...
... the Apis-bulls and couldn’t believe what they had found. Leading to the tomb was a paved avenue lined by lions that were carved out of stone. To enter the tomb they had to walk through a long and high arched narrow passageway cut into the rock. It extended for about 2,000 feet and was only 20 feet w ...
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.