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Topic: Galactic astronomy


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In the News (Fri 24 May 19)

  
 Galactic astronomy - Wikipedia, the free encyclopedia
Galactic astronomy is the study of our own Milky Way galaxy and all its contents.
Galactic astronomy should not be confused with galaxy formation and evolution, which is the general study of galaxies, their formation, structure, components, dynamics, interactions, and the range of forms they take.
The development of radio astronomy and submillimeter astronomy in the 20th Century allowed the gas and dust of the Milky Way to be mapped for the first time.
en.wikipedia.org /wiki/Galactic_astronomy   (344 words)

  
 Physics
Galactic astronomy and astrophysics research in the department can be characterized as multiwavelength imagery and spectroscopy studies of "astrophysical plasmas," ranging from nearby protostars and star-forming regions like the Orion Nebula, to distant star-forming galaxies.
Students in galactic astronomy can learn basic techniques in optical imagery and spectroscopy using a 36-inch research-quality telescope at George Observatory, 45 miles from campus, or at our observatory on-campus, which has a 16" Meade.
The star is surrounded by a dense disk of gas and dust that accretes onto the star as columns of material are lifted above the disk plane and crash onto the photosphere of the star.
www.physics.rice.edu /astro.cfm   (335 words)

  
 Galactic astronomy   (Site not responding. Last check: 2007-10-21)
Our own Milky Way galaxy where our solar system belongs is in some ways the studied although important parts of it are from view in visible wavelengths by regions of galactic dust.
For observational astronomy this is it: there is no better book The fact that the information is somehow out of date is not important, because the subject is mainly how the results are obtained, rather than the results themselves.
This conclusion, that we are between the years 2000 and 2012, going through the Galactic Equator Plane aligned with the central sun of t...
www.freeglossary.com /Galactic_astronomy   (391 words)

  
 Astronomy Departments
This is the homepage for the Columbia University Department of Astronomy and the Columbia Astrophysics Lab.
The stellar and galactic astrophysic departement (DASGAL) is one of the scientific department of the Paris-Meudon-Nançay Observatory (France).
Astronomy and Astrophysics in the Physics Department of Ohio University at Athens, Ohio.
www.cv.nrao.edu /fits/www/yp_dept.html   (10323 words)

  
 Observations of the galactic centre (from astronomy) --  Encyclopædia Britannica   (Site not responding. Last check: 2007-10-21)
The central region of the Milky Way Galaxy is so heavily obscured by large quantities of dust that direct observation has become possible only with the development of astronomy for wavelengths that penetrate to or relatively near the Earth's surface—namely, radio, infrared, and more recently X rays and gamma rays.
Galactic latitude is measured in degrees north or south of the Galaxy's fundamental plane of symmetry.
Observations on galactic and extragalactic objects and collection of recordings of celestial phenomena captured by the Hubble Space Telescope accompanied by photographs and animations.
www.britannica.com /eb/article-32529   (883 words)

  
 Sardinia Radio Telescope
Massive stars and circumstellar envelopes: despite their key role in the processes of galactic chemical enrichment and stellar evolution, supergiant stars are generally poorly known.
Most of the methods to estimate the density of such clouds is based on the determination of the excitation temperature of a particular molecular transition.
The results coming from studies of the polarisation of the galactic background, when added together to the HI emission observations' outcome, provide very useful information of the intergalactic medium's size scales and of the structure of the spiral arms in our Galaxy.
www.ca.astro.it /srt/galactic.htm   (1277 words)

  
 Category:Astronomy - Wikipedia, the free encyclopedia
Articles on this topic in other Wikimedia projects can be found at: Wikimedia Commons Category Astronomy
Astronomy is a science involving the observation and explanation of events occurring outside Earth and its atmosphere.
It includes the study of the origins, evolution, and physical and chemical properties of objects that can be observed in the sky.
en.wikipedia.org /wiki/Category:Astronomy   (99 words)

  
 The Milky Way Galaxy
The most distant stars and gas clouds of the system that have had their distance determined reliably lie roughly 72,000 light-years from the galactic centre, while the distance of the Sun from the centre has been found to be approximately 27,000 light-years.
The radial distribution, when plotted as a function of distance from the galactic centre, fits a mathematical expression of a form identical to the one describing the star distribution in elliptical galaxies, though there is an anomalous peak in the distribution at distances of about 40,000 light-years from the centre.
The strength of the galactic field is only about 0.000001 times the strength of the Earth's field at its surface, a value that is much too low to have dynamical effects on the interstellar gas that could account for the order represented by the spiral-arm structure.
www.wiedenhoff.nu /galaxy/galax3.htm   (13934 words)

  
 Galactic astronomy - Open Encyclopedia   (Site not responding. Last check: 2007-10-21)
Galactic astronomy is the study of galaxies, their formation, structure, components, dynamics, interactions, and the range of forms they take.
Our own Milky Way galaxy, where our solar system belongs, is in some ways the best studied, although important parts of it are obscured from view in visible wavelengths by regions of galactic dust.
Modern instruments, and particularly the Hubble Space Telescope, have allowed us to study galaxies other than our own in great detail.
www.open-encyclopedia.com /Galactic_astronomy   (83 words)

  
 Arizona Daily Wildcat - Long-time astronomy prof dies at age 71 - Monday, October 18, 2004   (Site not responding. Last check: 2007-10-21)
Raymond White received his doctorate in astronomy from the University of Illinois in Champagne-Urbana and began teaching at the UA in 1964.
His research areas included galactic astronomy, globular star clusters and cultural astronomy, before he retired from the UA in July 1999.
Frank Low, a UA Regents professor emeritus of astronomy who began working with Raymond White when they were "young astronomers" at the Steward Observatory, said Raymond White had a wealth of enthusiasm in his classroom that exceeded even the most dedicated teachers.
wildcat.arizona.edu /papers/98/40/01_2.html   (718 words)

  
 Galactic Astronomy   (Site not responding. Last check: 2007-10-21)
Holy Grail of fl hole astronomy is within grasp
kilometers (43.1 million miles) from Earth - a distance that in galactic terms is...
But at 43 million miles away, there's no threat of a galactic crash.
galactic-astronomy.wikiverse.org   (238 words)

  
 Sardinia Radio Telescope
These events are likely related to fluctuations in the diffuse (filamentary) medium and they constitutes an extremely interesting tool to investigate the nature of the medium.
Active Galactic Nuclei: to study the Active Galactic Nuclei, the SRT will be used mainly in interferometric networks.
temperature and density) of the galactic environments and on their chemical evolution.
www.ca.astro.it /srt/extra-galactic.htm   (1140 words)

  
 Other Resources (A-G)
This text was designed for an introductory astronomy course for upper high school or undergraduate students who want a comprehensive view and understanding of modern astronomy, including active galaxies (see chapter26).
This text was designed for an introductory astronomy course for upper high school or undergraduate students who want a comprehensive view and understanding of modern astronomy, including binary stars (see Chapter 17).
Astronomy Picture of the Day: Each day a different image or photograph of our fascinating Universe is featured, along with a brief explanation written by a professional astronomer.
imagine.gsfc.nasa.gov /docs/resources/resources_a.html   (3251 words)

  
 Astronomy Notes
Astronomy as a Science and a Sense of Scale.
The rotation curve and the existence of the dark matter halo, stellar populations, and the galactic center are also discussed.
Astronomy constants, physical constants, planets (orbital properties, physical characteristics, atmospheres), 100 nearest stars, and 100 brightest stars as seen from the Earth.
www.astronomynotes.com   (1102 words)

  
 Galactic Astronomy Book by James Binney, Michael Merrifield at Total-Photographer.com   (Site not responding. Last check: 2007-10-21)
The authors clearly know their stuff in very wide-ranging areas of astrophysics, and are passionate about them, as it comes across very clearly, and adds to the joy of reading this book.
Admittedly, if you were wanting an introduction to galactic astronomy this would not be the book for you, but, for its target audience it is an amazing book.
The 'Galactic Astronomy Book by James Binney, Michael Merrifield' and all other items from Amazon.com, are offered on the understanding that prices and availability may change at any time and are subject to Amazon.com's Conditions of use and sale.
www.total-photographer.com /Amazon_Pages/_Galactic+Astronomy_0691025657_z.asp   (899 words)

  
 SPACE.com -- Cosmic Fossils Show Milky Way Is a Galaxy Gobbler   (Site not responding. Last check: 2007-10-21)
These galactic denizens have been carving their present courses for millions and even billions of years, but only recently have astronomers realized that they are non-natives -- relics of intergalactic ingredients added to the Milky Way after the initial recipe had been written.
Helmi and her colleagues calculate that some 8 percent of the galactic halo is made up of material from the collision that left these stars behind.
Along with similar findings in the past, the results raise the question of whether the entire galactic halo is made up of material accreted via mergers with lesser galactic counterparts.
www.space.com /scienceastronomy/astronomy/galactic_clumps_991104.html   (936 words)

  
 Galactic Astronomy   (Site not responding. Last check: 2007-10-21)
As this SETI sweep progresses, researchers interested in the physics of the galactic center will be doing their astronomy thing by making pictures of this...
of being a variable, but no changes have been detected in modern astronomy.
This bright and splendid galactic cluster has received a variety of names over the...
www.wikiverse.org /galactic-astronomy   (246 words)

  
 Binney and Merrifield: Galactic Astronomy. Chapter 1: Galaxies: an overview   (Site not responding. Last check: 2007-10-21)
Large-scale galactic structures, on the other hand, are often best observed in external galaxies where we have a clear perspective on the whole system; when we try to study the large-scale properties of the Milky Way, we have considerable difficulty in seeing the wood for the trees.
By its very nature, astronomy is an observational science: we cannot tune the physical parameters of a galaxy to see how they alter its appearance; nor can we change our vantage point to get a better idea of its three-dimensional shape.
The remainder of this chapter is devoted to a brief description of the historical development of galactic astronomy.
www.pupress.princeton.edu /sample_chapters/binney/chapter_one.html   (10059 words)

  
 The Milky Way Galaxy
Radio astronomial investigations of the distribution of hydrogen clouds have revealed that the Milky Way is a spiral galaxy of Hubble type Sb or Sc.
These globular clusters are strongly concentrated toward the Galactic Center: From their apparent distribution in the sky, Harlow Shapley has concluded that this center of the Milky Way lies at a considerable distance (which he overestimated by factors) in the direction of Sagittarius and not rather close to us, as had been thought previously.
In addition to the overall Galactic Rotation, the solar system is moving between the neighboring stars (peculiar motion) at a velocity of about 20 km/s, to a direction called "Solar Apex," at the approximate position RA=18:01, Dec=+26 (2000.0); this motion has been discovered by William Herschel in 1783.
www.seds.org /messier/more/mw.html   (1383 words)

  
 Galactic astronomy - Encyclopedia.WorldSearch   (Site not responding. Last check: 2007-10-21)
Astrophysics Of Gaseous Nebulae And Active Galactic Nuclei
Galactic Alignment: The Transformation of Consciousness According to Mayan, Egyptian, and Vedic Traditions
Dust in the Galactic Environment (2nd Edition) (Graduate Series in Astronomy)
encyclopedia.worldsearch.com /galactic_astronomy.htm   (138 words)

  
 Positional Astronomy: <br>Galactic coordinates   (Site not responding. Last check: 2007-10-21)
We define the North Galactic Pole as that pole in same hemisphere as the North Celestial Pole.
To fix the galactic coordinates of object X, draw a great circle between the two galactic poles, passing through X. The galactic latitude (b) of object X is the angular distance on this circle from galactic equator to X, from - 90° at South Galactic Pole to +90° at North Galactic Pole.
The galactic longitude (l) of object X is the angular distance
star-www.st-and.ac.uk /~fv/webnotes/chapter8.htm   (262 words)

  
 Extra-Galactic Astronomy @ GCA7Sky
Astronomy Picture of the Day - NGC 1850- Not Found in the Milky Way
Astronomy 123 - Galaxies Davison E. Soper, Univ. of Oregon
Extragalactic Bookmarks and Education in Extragalactic astronomy bookmarks of Phillipe Prugniel.
members.aol.com /gca7sky/galactic.htm   (896 words)

  
 astrometry concept from the Astronomy knowledge base   (Site not responding. Last check: 2007-10-21)
abstraction > science > astronomy > galactic astronomy > astrometry
has definition The branch of astronomy that deals with measuring the positions of celestial objects, especially stars.
Astrometrists measure parallaxes and proper motions, which allow astronomers to determine the distances and velocities of the stars.
www.site.uottawa.ca:4321 /astronomy/astrometry.html   (45 words)

  
 About Galactic Astronomy: James Binney Michael Merrifield - essay - summary - review 0691004021 0691025657 isbn
Galactic and Extragalactic Infrared Spectroscopy Proceedings of the 16th Symposium Toledo Spain December 6 - 8 1982 Spain Kessler MF Eslab Symposium Toledo
Galactic and Solar System Optical Astrometry Proceedings of the Royal Greenwich Observatory and the Institute of Astronomy Workshop Held in Cambri LV Morrison GF Gilmore
Galactic Alignment: The Transformation of Consciousness According to Mayan, Egyptian and Vedic Traditions John Major Jenkins
www.bookreviewssite.com /40460_jamesbinneymichaelmerrifield.html   (167 words)

  
 ASP: Web Sites for Instructors of Introductory Astronomy Courses
This is a leading group in astronomy education and their web pages have information about college teaching workshops, studies, and resources.
A short but interesting summary of two workshops for astronomy department chairs held by the American Astronomical Society, in which participants developed a set of common goals for introductory astronomy classes.
A listing of some web-based K-12 astronomy activities; many can be adapted to college labs or assignments.
www.astrosociety.org /education/resources/educsites.html   (1030 words)

  
 Galactic Astronomy at UCLA
Michael Rich is working on the composition of stars in the bulge and center of the Galaxy, and the kinematics of giants in the halo of M31.
Michael Muno is a Hubble fellow interested in the population of Galactic white dwarfs, neutron stars, and fl holes.
Seth Hornstein is working with Andrea Ghez studying the variability of the infrared counterpart to the supermassive fl hole at the Galactic Center.
www.astro.ucla.edu /research/galastron.shtml   (609 words)

  
 Galactic astronomy   (Site not responding. Last check: 2007-10-21)
Galactic astronomy is the study of galaxies, their formation,structure, components, dynamics, interactions, and the range of forms they take.
Our own Milky Way galaxy, where our solar system belongs, is in some ways the best studied, although important parts of it are obscured from viewin visible wavelengths by regions of galactic dust.
Modern instruments, andparticularly the Hubble Space Telescope, have allowedus to study galaxies other than our own in great detail.
www.therfcc.org /galactic-astronomy-1576.html   (88 words)

  
 Parallax   (Site not responding. Last check: 2007-10-21)
Stellar distance estimates are crucial to understanding stellar properties and underpin the whole distance network for galactic and extragalactic astronomy.
The view is from the north galactic pole.
The foreground star is shown as a filled orange circle and the background star field on the right-hand image.
instruct1.cit.cornell.edu /courses/astro101/java/parallax/parallax.html   (315 words)

  
 Universe Today - It's a Galaxy Eat Galaxy Universe
Examples of this kind of galactic destruction are hard to find because the consumed are usually dim dwarf galaxies.
Subaru telescope's ability to gather large amounts of light and focus it into a superbly sharp image was essential for this new discovery.
Although no human alive today will be able to witness the ultimate of fate of the newly discovered pair, chances are the elliptical galaxy will be able to complete the meal it's begun and fully consume its neighbor.
www.universetoday.com /am/publish/galaxy_eat_galaxy.html   (693 words)

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