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13. Coma cluster
- www.noao.edu
- Cluster of galaxies in Coma Berenices.
- Cluster of galaxies in Coma Berenices .
- The Coma Berenices cluster of galaxies contains more than 1000 galaxies, with a large number of E (elliptical) and S0 (lenticular) types. ...
- Minimum credit line: Omar Lopez-Cruz & Ian Shelton/NOAO/AURA/NSF (for details see Conditions of Use) Return to: galaxies page, elliptical galaxies page. ...
14. Classifying Galaxies
- www.smv.org
- Classifying Galaxies .
- An Interactive Lesson on the Hubble System of Classifying Galaxies .
- Hubble classification of galaxies .
- Students will observe examples of galaxies that have different shapes. ...
- Students will observe how the galaxy classification system of Edwin Hubble assigns galaxies to different groups according to their shapes. ...
- Students will attempt to categorize unknown galaxies according to the Hubble classification descriptors. ...
- Images from telescopes all over the world show the vast variety of galaxies. ...
15. Seyfert Galaxies
- www-astronomy.mps.ohio-state.edu
- Seyfert Galaxies.
- Doctoral Dissertation: The Circumnuclear Environment of Nearby, Non-Interacting Seyfert Galaxies. ...
- The Spectra of Narrow-Line Seyfert 1 Galaxies, Osterbrock, D. ...
- Optical Spectra of Narrow Emission-Line Palomar-Green Galaxies, Osterbrock, D. ...
- The Circumnuclear Environment of Nearby, Non-Interacting Seyfert Galaxies. ...
- Ionized Gas in the Nuclear Regions of Nearby Non-Seyfert Spiral Galaxies. ...
- , 1989, in ESO Workshop on Extranuclear Activity in Galaxies - May 1989, ed. ...
- High Spatial Resolution Imaging Spectrophotometry of Seyfert Galaxies, Pogge, R. ...
- Subarcsecond-scale Optical and Radio Structure Correlations in Seyfert Galaxies, Pogge, R. ...
- Shocking Outflows in Seyfert Galaxies: An Imaging Perspective, Pogge, R. ... , 1997, in Emission Lines in Active Galaxies: New Methods and Techniques, Proceedings of IAU Colloquium #159, ed. ...
16. Galaxies
- www.maa.mhn.de
- The Milky Way and Other Galaxies.
- This set of notes by Nick Strobel covers: the structure of our Galaxy, the characteristics of other galaxies and finding distances to other galaxies. ... A photo gallery of different galaxies is at the bottom of the page. ...
- Other Galaxies .
- Types of Galaxies .
- Distances to Galaxies .
- Masses of Galaxies .
- Origin of Galaxies .
- Clusters of Galaxies .
- Photo Gallery of Galaxies .
- Gas is compressed in arms (most spiral galaxies usually have two arms) to form stars. ... But other galaxies have spirals that are not wound up which implies that spirals are long-lasting and spirals occupy entire disk. ...
- Other Galaxies.
- Types of Galaxies.
- Most galaxies are small and faint-at far distances only see luminous galaxies. Edwin Hubble (in 1936) classifies galaxies using ``tuning-fork diagram''. ...
17. COMPACT GROUPS OF GALAXIES
- www.astro.ubc.ca
- COMPACT GROUPS OF GALAXIES.
- This page provides links to references and data on compact groups of galaxies. ...
18. ADC Quick Reference: Basic Data on Groups and Clusters of Galaxies
- adc.gsfc.nasa.gov
- Pairs of Galaxies .
- Small Groups of Galaxies .
- Galaxies (general) .
- Quasars & Active Galaxies .
- This quick reference page is designed to point the user toward some of the more frequently used ADC dataset holdings regarding basic data on groups and clusters of galaxies. ...
- PAIRS OF GALAXIES.
- 7077 Isolated Pairs of Galaxies in the Northern Hem (Karachentsev 1972) .
- 7168 Double Galaxies in SGP region (Zou+, 1989) .
- J/A+A/297/28 Dynamics in E+E pairs of galaxies (Bonfanti+, 1995) .
- J/A+AS/110/131 Mixed pairs of galaxies. ...
- J/A+AS/110/19 Kinematical observations of pairs of galaxies (Davoust+ 1995) .
- J/A+AS/110/371 Sourthern binary galaxies. ...
- J/A+AS/125/329 Southern binary galaxies radial velocities (de Souza+ 1997) .
- J/A+AS/144/475 Accurate positions for 17124 galaxies (Paturel+, 2000) .
- J/ApJ/511/595 An X-Ray Survey of Galaxies in Pairs (Henriksen+, 1999) .
- J/ApJS/106/27 Spiral galaxies in pairs (Keel 1996) .
19. Guide to Space & Astronomy
- www.star.le.ac.uk
- Elliptical Galaxies.
- Spiral galaxies| Elliptical galaxies | Irregular galaxies .
- These galaxies have a fairly featureless appearance, and range from objects which are almost spherical, to those which are almost flat. Those which are spherical are classed as E0 galaxies, and those which are flattest are E7, with the types inbetween being given the numbers E1 to E6. ...
- M59 is a member of the Virgo cluster of galaxies.
- What determines the shape of elliptical galaxies ?.
- There is rarely any true structure visible in elliptical galaxies, unlike the magnificent forms we see in the spirals. In fact, elliptical galaxies are vast collections of stars which remain relatively close together because of the gravitational attraction between them. ...
- It is interesting to note that, although the system of classifying the ellipticity of these galaxies illustrated above, is capable of producing labels of up to E10, in reality we only see objects of classes up to and including E7.
- The physical nature of elliptical galaxies.
- The difference between elliptical and spiral galaxies is not a superficial one limited to appearance. ... To begin with, colour photographs of ellipticals show that they are more red in colour than spirals (note, however, that the image of M32 at the top of this page is a false colour one !) The reason for this difference is that elliptical galaxies contain a majority of old stars. ... Furthermore, elliptical galaxies contain very little gas and dust (a fact which also hampers the formation of new stars). ...
- Elliptical galaxies are found in a much wider range of masses than their spiral counterparts; 100,000 to 10,000,000,000,000 solar masses according to one estimate ! Sizes are similarly varied, with observations showing that objects can have diameters of between 1 and 100 kiloparsecs (or 3260 to 326,000 lightyears). In the light of these facts, it is not surprising to find that elliptical galaxies show a larger range in brightness; some can be up to 10 times brighter than the brightest spirals. ...
- Lack of form, an old stellar population - these observations have led astronomers to believe that the elliptical galaxies formed earlier than spirals. ... Radio astronomers have detected quantities of gas and dust in some ellipticals, and some of these galaxies have been found to be very "noisy" in the radio region of the electromagnetic spectrum.
20. Stars & Galaxies
- cosmos.colorado.edu
- STARS AND GALAXIES.
- Galaxies and the Universe.
- Active Galaxies.
21. Star Wars Galaxies
- starwarsgalaxies.station.sony.com
- EverQuest EverQuest - Dragons of Norrath Champions of Norrath Champions: Return to Arms EverQuest Online Adventures EverQuest II PlanetSide Star Wars Galaxies Untold Legends Cosmic Rift Infantry Tanarus .
- Home Gallery Updates Current Publish Update History Friday Features Dev Cycle In Live In Testing In Development In Concept Community Player Events Current Events Home Show Fan Fests Team Comments Official Sites Community Sites Fan Club Newsletter Forums Dev Tracker Announcements Game Updates Galaxies Professions Trade Other Tech Support Combat Upgrade Manual New Player Guide Advanced Guides Current Manual Glossary Support Knowledge Base Character Transfer Service Accounts/Billing Tech Support Network Status Submit Feedback Time Zones Join Test Center Rules and Policies Contact Us .
- Set in the Star Wars timeframe between Episode IV and Episode V, this first extension to the Star Wars Galaxies opens 10 vast and distinct space sectors, spanning from the Core Worlds to the Outer Rim, for players to explore while engaging their opponents in intense real-time combat or uniting with friends in battle or exploration. ...
- Star Wars Galaxies is a registered trademark of Lucasfilm Entertainment Company Ltd. ...
22. Arp Peculiar GalaxyClub Introduction
- www.astroleague.org
- the Peculiar Galaxies. ...
- Arp is one of the key actors in the contemporary debate on the origin and evolution of galaxies in the universe. His landmark compilation of peculiar galaxies led him to challenge the fundamental assumption of modern cosmology, that redshift is a uniform indicator of distance. ... He studied at Caltech, and as a graduate student he specialized in the study of distant galaxies. One major characteristic of these galaxies is that they all have an observable redshift in their spectrum. ... All of the distant galaxies Arp observed were redshifted, meaning they are travelling away from us. Astronomers interpret this to mean that the fabric of the universe is expanding, pulling all the galaxies away from all the other galaxies. ... The distance to all but the nearest galaxies is virtually impossible to measure by most techniques, and the remaining techniques require a supernova to erupt in a galaxy to facilitate the measurement of the distance. ... Arp became a technically excellent photographer of galaxies. ... Arp became especially interested in galaxies that have a unusual or abnormal shapes. He felt that by studying the peculiar galaxies, we could understand how galaxies form and why most of them fall into the elliptical or spiral shape classes. ... To promote the study of unusual galaxies, Arp compiled the Atlas of Peculiar Galaxies, which is the basic reference work on 338 of the most striking of these objects.
- From the Preface to Atlas of Peculiar Galaxies, Astrophysical Journal Supplement Number 123, Volume 14, November 1966, University of Chicago Press: "Forty years after the discovery that galaxies were independent stellar systems, we still have not penetrated very far into the mystery of how they maintain themselves or what physical forces are responsible for shaping their observed forms. The galaxies are the constituent units of mass and energy in the Universe, and yet we are still challenged by such questions as: What causes the characteristic shape of spiral galaxies? How are elliptical galaxies related to spirals? How are galaxies formed, and how do they evolve? "It is difficult to resist an oversimplified impression of what a galaxy is because the Hubble classification divides the galaxies into the well-known categories of smooth amorphous ellipticals, and flattened spirals with star-studded arms. But far from all galaxies fit the Hubble sequence of nebular forms. ... Appreciation of these peculiarities is important in order to build a realistic picture of what galaxies are really like. ... "The peculiarities of the galaxies pictured in this Atlas represent perturbations, deformations, and interactions which should enable us to analyze the nature of real galaxies we observe and which are too remote to experiment on directly. In general, the more conspicuous the peculiarity, the more illustrative it is of special events and reactions that occur in galaxies. ... "The present Atlas specifically started from an attempt to better understand spiral galaxies. Despite even recent analyses from a contrary standpoint, I believe that gravitational orbits in a stellar assemblage will not alone furnish satisfactory explanations of galaxies. it is clear that the convolution which spiral arms are seen to undergo in certain galaxies cannot be performed by loci of stellar orbits. In the investigation of these special spiral properties, therefore, galaxies which showed unusual or perturbed arms or filamentary extensions were samples with high resolution photographs with the Palomar 200-inch telescope. ... "The Atlas as it has been realized in the following pages illustrates again that galaxies cannot be characterized as just assemblages of stars, radiation, and gravitation.
23. The Leo Triplett (M66 group)
- seds.lpl.arizona.edu
- This small group of galaxies consists of the Messier objects M65 (NGC 3623) and M66 (NGC 3627) as well as the edge-on spiral NGC 3628. These three galaxies, the heart of the M66 group, form a beautiful and photogenic group which is frequently referred to as the Leo Triplett; Halton Arp has included this group as number 317 in his Catalogue of Peculiar Galaxies (M66 is also Arp 16). ...
24. Chandra :: Field Guide to X-ray Sources :: Quasars & Active Galaxies
- chandra.harvard.edu
- Quasars & Active Galaxies .
- Quasars are peculiar objects that radiate as much energy per second as a thousand or more galaxies, from a region that has a diameter about one millionth that of the host galaxy. ... Almost all galaxies, including our own, are thought to contain supermassive black holes in their centers. ...
- Our Milky Way Galaxy and our neighbor, the Andromeda Galaxy, are examples of normal galaxies, where the supermassive black hole has very little gas to capture. ...
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