Study Guide 4 Part A Outline
... Working out the nature of the Milky Way o Hard to tell where Sun is located, due to absorption by dust. Star counts gave wrong answer. Pulsating variable stars in globular clusters finally showed that Sun is far from the center. o This all culminated in the Curtis-Shapley debate (1920). The issu ...
... Working out the nature of the Milky Way o Hard to tell where Sun is located, due to absorption by dust. Star counts gave wrong answer. Pulsating variable stars in globular clusters finally showed that Sun is far from the center. o This all culminated in the Curtis-Shapley debate (1920). The issu ...
galaxy.
... • The zone of avoidance must be an artifact of something in our galaxyperhaps dust extinction- blocking our view of galaxies in the Milky Way. • S Andromeda was not a normal nova. It was something else, something much brighter. • Slipher’s observations of several spiral nebulae showed that they had ...
... • The zone of avoidance must be an artifact of something in our galaxyperhaps dust extinction- blocking our view of galaxies in the Milky Way. • S Andromeda was not a normal nova. It was something else, something much brighter. • Slipher’s observations of several spiral nebulae showed that they had ...
Science Lesson 24: Galaxies
... 4. The galaxy shown in the illustration on page 163 is 52 light-‐years away from the next closest galaxy. Over time, how will this distance most likely change? Why? ...
... 4. The galaxy shown in the illustration on page 163 is 52 light-‐years away from the next closest galaxy. Over time, how will this distance most likely change? Why? ...
Galaxies Powerpoint
... gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
... gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
Main Types of Galaxies
... gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
... gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the galaxy. ...
The Milky Way – A Classic Galaxy
... galaxies” which had already formed stars, and schmushed it all together into what is now the central bulge. • Then, more slowly, gas fell in from farther out, had angular momentum, and so settled into a flat disk, and only gradually is forming itself into stars. • Globular clusters formed during the ...
... galaxies” which had already formed stars, and schmushed it all together into what is now the central bulge. • Then, more slowly, gas fell in from farther out, had angular momentum, and so settled into a flat disk, and only gradually is forming itself into stars. • Globular clusters formed during the ...
Galaxies The Milky Way
... There are galaxies of various shapes and patterns, but they can be grouped into four main types – spiral, barred spiral, elliptical, and irregular. Like moons and planets, galaxies spin and move around in space. They are travelling away from each other at up to 112 651 km per second. The largest gal ...
... There are galaxies of various shapes and patterns, but they can be grouped into four main types – spiral, barred spiral, elliptical, and irregular. Like moons and planets, galaxies spin and move around in space. They are travelling away from each other at up to 112 651 km per second. The largest gal ...
ppt
... • Apparent magnitude - doesn't measure how bright objects actually are; it measures how bright they appear to us, which also depends on how close they are eg Sun has m = -26.74 • Absolute magnitude - measures how bright objects actually are -- it is defined as the apparent magnitude that an object w ...
... • Apparent magnitude - doesn't measure how bright objects actually are; it measures how bright they appear to us, which also depends on how close they are eg Sun has m = -26.74 • Absolute magnitude - measures how bright objects actually are -- it is defined as the apparent magnitude that an object w ...
Lec12
... squeezed as they move into spiral arms 2. Squeezing of clouds triggers star formation 3. Young stars flow out of spiral arms ...
... squeezed as they move into spiral arms 2. Squeezing of clouds triggers star formation 3. Young stars flow out of spiral arms ...
stars_space
... The name of our _________ is The Milky Way. The ______ located towards the outer edge of our galaxy. spiral The are different types of galaxy; ________, barred-spiral, barred-spiral elliptical and irregular. The Milky Way is a ____________ Andromeda galaxy. The _____________ Galaxy is the nearest sp ...
... The name of our _________ is The Milky Way. The ______ located towards the outer edge of our galaxy. spiral The are different types of galaxy; ________, barred-spiral, barred-spiral elliptical and irregular. The Milky Way is a ____________ Andromeda galaxy. The _____________ Galaxy is the nearest sp ...
1_Introduction
... The Galaxy has an entourage of star clusters that (on average) are at rest with respect to the Galaxy’s center. ...
... The Galaxy has an entourage of star clusters that (on average) are at rest with respect to the Galaxy’s center. ...
ASTR101 Unit 14 Assessment Answer Key 1. It is believed that the
... 1. It is believed that the existence of liquid on a planet is a requirement for the existence of life. The habitable zone is the range of distances from a particular star such that the temperature of a planet would allow for liquid water on the surface. 2. The number of stars in the Milky Way Galaxy ...
... 1. It is believed that the existence of liquid on a planet is a requirement for the existence of life. The habitable zone is the range of distances from a particular star such that the temperature of a planet would allow for liquid water on the surface. 2. The number of stars in the Milky Way Galaxy ...
AY1 Homework for Quiz 3: Spring 2017
... 13. What is believed to be the source of energy for QSOs and Active Galactic Nuclei radiation (check all that are true)? ___ material being heated as it is falling into a supermassive black hole ...
... 13. What is believed to be the source of energy for QSOs and Active Galactic Nuclei radiation (check all that are true)? ___ material being heated as it is falling into a supermassive black hole ...
Solar System where_are_we
... Earth travels 595 million miles around the sun each year. Its orbit is an ellipse, which is a long oval shape. As it travels around the sun, it also rotates around its own axis. So, even though the sun appears to be moving across the sky, it is our earth that is turning and moving ...
... Earth travels 595 million miles around the sun each year. Its orbit is an ellipse, which is a long oval shape. As it travels around the sun, it also rotates around its own axis. So, even though the sun appears to be moving across the sky, it is our earth that is turning and moving ...
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.