| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,769,223,019 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
Abell richness classes |
0.06 sec. |
|
Abell richness classes [′ā·bəl ′rich·nəs ‚klas·əz] (astronomy) A scale of six categories of richness into which clusters of galaxies are classified, based on the number of galaxies observed in the cluster that are not more than 2 magnitudes fainter than the third-brightest member. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| ? Mentioned in | |
|---|---|
|
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|