- Astrophoto Index
This site contains a large collection of images of galaxies, star clusters, and nebulae.
http://schmidling.netfirms.com/phoindex.htm
(Added: Tue Oct 29 2002)
- CCD Images of Galaxies
This is a large collections of images of galaxies of all types.
http://www.psiaz.com/Schur/astro/ccdgalaxies.html
(Added: Tue Oct 29 2002)
- Classification of Galaxies
Galaxies come in a great variety of shapes and sizes but can be instantly classified into two main types just by looking at them. Classification by appearance is what astronomers call a morphological classification scheme and nearly all galaxies are either elliptical or spiral in appearance.
http://www.herts.ac.uk/astro_ub/a21_ub.html
(Added: Tue Oct 29 2002)
- Classifying Galaxies
Classifying Galaxies: A lesson on how Galaxies are classified by shape.
http://www.smv.org/hastings/teacher.htm
(Added: Fri Oct 25 2002)
- Colliding Galaxies
There are many instances where galaxies appear to be interacting with each other enough to cause obvious distortions of the galaxies that interact. These interactions may have a significant connections with the manner in which galaxies evolve with time.
http://csep10.phys.utk.edu/astr162/lect/galaxies/colliding.html
(Added: Tue Oct 29 2002)
- Colliding Galaxies and the Fate of the Milky Way
The Hubble Space Telescope images provided a detailed look at the "fireworks show" showing a collision between two galaxies where it was claimed that "over 1,000 bright, young star clusters were seen "bursting to life" as a result of the head-on wreck."
http://www.prime-radiant.com/Colliding_Galaxies.html
(Added: Tue Oct 29 2002)
- Elliptical Galaxies
Many galaxies take the form of ellipsoids, with no spiral structure or flattened disks. Elliptical galaxies constitute approximately 10% of observed galaxies.
http://csep10.phys.utk.edu/astr162/lect/galaxies/elliptical.html
(Added: Tue Oct 29 2002)
- Galactic Evolution
Evolution of galaxies has been a concern of astronomers for a long time. Ever since it was realized that stars are not eternal and evolve, people have asked the question how galaxies themselves evolve with a changing star population.
http://www.phy.ohiou.edu/~dutta/notes/node16.html
(Added: Sat Oct 26 2002)
- Galaxy Clusters and Large-Scale Structure
Galaxies are preferentially found in groups or larger agglomerations called clusters. The Local Group consists of our own galaxy, the larger spiral galaxy Andromeda (M31) and several smaller satellites, including the Large and Small Magellenic Clouds.
http://www.damtp.cam.ac.uk/user/gr/public/gal_lss.html
(Added: Sat Oct 26 2002)
- Hubble's Tuning Fork Diagram
After he discovered what galaxies really were, Edwin Hubble became the first person to classify galaxies. Astronomers use his system, called the "Hubble Tuning Fork," even today.
http://skyserver.fnal.gov/en/proj/advanced/galaxies/tuningfork.asp
(Added: Sat Oct 26 2002)
- Irregular Galaxies
Approximately 3% of galaxies observed cannot be classified as either ellipsoidal or spirals. These galaxies have little symmetry in their structure and are termed irregular galaxies.
http://csep10.phys.utk.edu/astr162/lect/galaxies/irregular.html
(Added: Tue Oct 29 2002)
- Large scale structure of the Cosmos
Stars are organized into galaxies which in turn appear to form clusters and superclusters, separated by voids. Prior to 1989 it was commonly assumed that the superclusters were the largest structures in existence, and that they were distributed more-or-less uniformly throughout the universe in every direction.
http://www.wikipedia.org/wiki/Large_Scale_Structure_of_the_Cosmos
(Added: Tue Oct 29 2002)
- Messier Catalog - SEDS
A wonderful collection images and information about of the galaxies, star clusters and nebulae of the Messier Catalog provided by the Students for the Exploration and Development of Space (SEDS).
http://www.seds.org/messier/
(Added: Mon Oct 07 2002)
- New General Catalog - SEDS
Images and information about of the galaxies, star clusters and nebulae of the New General Catalog provided by the Students for the Exploration and Development of Space (SEDS).
http://www.seds.org/messier/xtra/ngc/ngc.html
(Added: Mon Oct 07 2002)
- Spiral Galaxies
Galaxies come in a variety of shapes, with the shapes depending in a way not yet completely understood on the evolution of the galaxies. More than half of all observed galaxies are spiral galaxies.
http://csep10.phys.utk.edu/astr162/lect/galaxies/spiral.html
(Added: Sat Oct 26 2002)
- The Hubble Classification
Hubble introduced the classification scheme illustrated in the following figure, which separates most galaxies into elliptical, normal spiral, and barred spiral categories, and then sub-classifies these categories with respect to properties such as the amount of flattening for elliptical galaxies and the nature of the arms for spiral galaxies. The galaxies that do not fit into these categories are classified separately as irregular galaxies.
http://csep10.phys.utk.edu/astr162/lect/galaxies/hubble.html
(Added: Sat Oct 26 2002)
- The Magellanic Clouds
Images of our galaxy's brightest satellite systems are the Magellanic Clouds, obvious naked-eye objects deep in the southern skies.
http://www.astr.ua.edu/gifimages/lmc_smc.html
(Added: Mon Oct 07 2002)
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