Lecture Eleven (Powerpoint format)
... “The Shapley-Curtis debate makes interesting reading even today. It is important, not only as a historical document, but also as a glimpse into the reasoning processes of eminent scientists engaged in a great controversy for which the evidence on both sides is fragmentary and partly faulty. This d ...
... “The Shapley-Curtis debate makes interesting reading even today. It is important, not only as a historical document, but also as a glimpse into the reasoning processes of eminent scientists engaged in a great controversy for which the evidence on both sides is fragmentary and partly faulty. This d ...
Earth in the Universe Answer each in your binder or notebook. Date
... Which statement about stars is not accurate? A. A small group of stars is called a galaxy. B. Stars consist mainly of hydrogen and helium. C. Types of stars include red giants, super giants, and dwarf stars. D. Constellations of stars are found in different places in the sky. ...
... Which statement about stars is not accurate? A. A small group of stars is called a galaxy. B. Stars consist mainly of hydrogen and helium. C. Types of stars include red giants, super giants, and dwarf stars. D. Constellations of stars are found in different places in the sky. ...
![Galaxies[1] - salendinenookphysics](http://s1.studyres.com/store/data/008083907_1-b5969f7f2ab35a1d0e21378b751ce81e-300x300.png)
Handout from Allaire Star Party
... in our galaxy, dating almost to the formation of the universe 13.7 billion years ...
... in our galaxy, dating almost to the formation of the universe 13.7 billion years ...
The Milky Way: Home to Star Clusters
... was the original extent of the galaxy, and that this was created first, from the primordial gas that eventually collapsed in on itself, also demonstrated by the old stars contained within the globular clusters. This matter condensed to create the central bulge, which ultimately began to rotate, crea ...
... was the original extent of the galaxy, and that this was created first, from the primordial gas that eventually collapsed in on itself, also demonstrated by the old stars contained within the globular clusters. This matter condensed to create the central bulge, which ultimately began to rotate, crea ...
Lab 9
... How accurate were you? Is the criterion or criteria you used a good way to find galaxy distances? ...
... How accurate were you? Is the criterion or criteria you used a good way to find galaxy distances? ...
The Milky Way Galaxy
... To determine the rotation curve of the Galaxy, we will introduce a more convenient coordinate system, called the Galactic coordinate system. Note that the plane of the solar system is not the same as the plane of the Milky Way disk, and the Earth itself is tipped with respect to the plane of the sol ...
... To determine the rotation curve of the Galaxy, we will introduce a more convenient coordinate system, called the Galactic coordinate system. Note that the plane of the solar system is not the same as the plane of the Milky Way disk, and the Earth itself is tipped with respect to the plane of the sol ...
Document
... Galaxy cluster in Hercules Abell 2151 Group Hickson Compact 650 millionHCG87 light year across Centaurus A 170,000 light year across Irregular galaxy ...
... Galaxy cluster in Hercules Abell 2151 Group Hickson Compact 650 millionHCG87 light year across Centaurus A 170,000 light year across Irregular galaxy ...
chapter 26 instructor notes
... applications of the Virial Theorem produce typical values like tff ≈ 200 106 years and tcool ≈ 8 106 years for the free-fall collapse time scale and cooling time scale, respectively, implying that tcool << tff. For tcool >> tff one predicts galaxy masses of 1081012 M, much like what is observe ...
... applications of the Virial Theorem produce typical values like tff ≈ 200 106 years and tcool ≈ 8 106 years for the free-fall collapse time scale and cooling time scale, respectively, implying that tcool << tff. For tcool >> tff one predicts galaxy masses of 1081012 M, much like what is observe ...
Constellations - Sierra Star Gazers
... For directions to the Icehouse Observing Park, just refer to last page of this list. Please turn off your headlights, park your vehicle and set up your instruments as directed. Over the years the SSG Coordinators have made (and survived) just about every setup and observing error possible, so don’t ...
... For directions to the Icehouse Observing Park, just refer to last page of this list. Please turn off your headlights, park your vehicle and set up your instruments as directed. Over the years the SSG Coordinators have made (and survived) just about every setup and observing error possible, so don’t ...
Diapositiva 1
... The “halo” is really the “stellar halo” – turns out there’s actually a larger halo we can’t even see! ...
... The “halo” is really the “stellar halo” – turns out there’s actually a larger halo we can’t even see! ...
Galaxy Notes Presentation
... from the center Cannot actually count the number of stars in the galaxy, can estimate as roughly 100 billion ...
... from the center Cannot actually count the number of stars in the galaxy, can estimate as roughly 100 billion ...
Measuring Distances - Stockton University
... pc, although on individual objects this can be extended to about 100 pc (with much effort). The HIPPARCOS satellite extended reliable measurements out to 100 pc for many thousands of stars, but this still compares badly with the 8000 pc to the center of our Galaxy. Clearly we need other methods if w ...
... pc, although on individual objects this can be extended to about 100 pc (with much effort). The HIPPARCOS satellite extended reliable measurements out to 100 pc for many thousands of stars, but this still compares badly with the 8000 pc to the center of our Galaxy. Clearly we need other methods if w ...
PH607lec10
... mass of about 1012 solar masses, comprising 200-400 billion stars. A BARRED SPIRAL: It was only in the 1980s that astronomers began to suspect that the Milky Way is a barred spiral rather than an ordinary spiral, which observations in 2005 with the Spitzer Space Telescope have since confirmed, showi ...
... mass of about 1012 solar masses, comprising 200-400 billion stars. A BARRED SPIRAL: It was only in the 1980s that astronomers began to suspect that the Milky Way is a barred spiral rather than an ordinary spiral, which observations in 2005 with the Spitzer Space Telescope have since confirmed, showi ...
Peculiar (Interacting) Galaxies
... formation, due to collisions between gas clouds. In addition • Gas which loses enough angular momentum during the encounter will fall into the center. (This is especially true if a bar is formed.) This can lead to strong nuclear starbursts. § M82 is currently forming a few M¤/year of stars (simila ...
... formation, due to collisions between gas clouds. In addition • Gas which loses enough angular momentum during the encounter will fall into the center. (This is especially true if a bar is formed.) This can lead to strong nuclear starbursts. § M82 is currently forming a few M¤/year of stars (simila ...
Slide 1
... Making of a spiral galaxy • Start with a fairly uniform cloud of hydrogen • Gravitational collapse forms protogalactic clouds • First stars are born in this spheroid (such stars are billions of years old “fossil record”) ...
... Making of a spiral galaxy • Start with a fairly uniform cloud of hydrogen • Gravitational collapse forms protogalactic clouds • First stars are born in this spheroid (such stars are billions of years old “fossil record”) ...
prayer-pps.pps - Sister Raquel Blog
... the Light glowed in the darkness and the darkness could not overcome the Light He came to what was His own but His own did not accept Him and the Word was made flesh and He lived among us ...
... the Light glowed in the darkness and the darkness could not overcome the Light He came to what was His own but His own did not accept Him and the Word was made flesh and He lived among us ...
Andromeda Galaxy
.jpg?width=300)
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.