Size of galexies.

[Skyraider]

We all know that galexies are composed of billions of stars. My question is are there galexies that are composed of millions or billions of galexies?

[borealis]

My question is are there galexies that are composed of millions or billions of galexies?

A galaxy is composed of stars, a universe is composed of galaxies. Whether it's millions or billions of galazies, I don't know. They are both very large numbers.

One theory is we can only see about 20% of the universe, since 80% is composed of "dark matter", which can't be seen.

Interestingly on the Science Channel yesterday, there was a program discussing the possibilities of parallel universes. Way beyond my imagination, but thought provoking.

[jesusfreak16]

Have you ever seen Mirror,Mirror on the Star Trek original series?(1966-69)
Hmm...

[GOD]

We all know that galexies are composed of billions of stars. My question is are there galexies that are composed of millions or billions of galexies?

Skyraider> Galaxies are grouped in clusters. Galaxy clusters are grouped in superclusters. Superclusters are grouped in walls. Walls are DNA of our living universe.

[harry]

G'day from the land of ozzzzzzz

I had these links in my comp, they maybe of interest.

Galaxies and Clusters of Galaxies
http://www.ing.iac.es/PR/science/galaxies.html

All About Galaxies
http://www.space.com/galaxy/

Galaxy Clusters and Large-Scale Structure
http://www.damtp.cam.ac.uk/user/gr/public/gal_lss.html

Groups and Clusters of Galaxies
http://www.seds.org/messier/gal_clus.html


Most Distant Cluster of Galaxies Located
http://universe.nasa.gov/press/2006/060605c.html

June 5, 2006 CALGARY -- Astronomers at the 208th American Astronomical Society meeting in Calgary announce the discovery of the most distant cluster of galaxies ever found, which may also be the most massive one yet seen at such an early era in the Universe. A cluster of galaxies is a large number of galaxies, gravitationally bound together, in a relatively small volume of space, all at the same distance from us.

"The key question now is: What's it doing there?" said Prof. Bob Nichol from the University of Portsmouth (England) and co-author on the paper. "This massive lump of matter is three-quarters the way back to the Big Bang!"

Almost 10 billion light-years from Earth (at a redshift z=1.45), cluster XMMXCS 2215-1738 contains hundreds of galaxies surrounded by superheated, X-ray-emitting gas at more than 10 million degrees. The XMM Cluster Survey (XCS) team used observations from the European X-ray Multi Mirror (XMM) Newton satellite to discovery this new cluster and then determined its distance using the 10-meter W. M. Keck telescope in Hawaii.

Actually it is not the most distant. Deep field images show super clusters at 13.2 Gyrs.

The Atlas of the universe
http://www.atlasoftheuniverse.com/

Map of the universe
http://www.seb.cc/mapuniverse/
This may interest you.

INTERACTIVE SPACE MAP
http://www.bbc.co.uk/science/space/playspace/spacemap/

Sloan map
http://www.sdss.org/news/releases/20031 ... ctrum.html

First 3D map of the Universe's Dark Matter scaffolding
http://www.spacetelescope.org/news/html/heic0701.html

Biggest map of universe reveals colossal structures
http://space.newscientist.com/article/d ... tures.html

Chandra Sky Map
http://chandra.harvard.edu/photo/map/


http://www.atlasoftheuniverse.com/