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Dmoz 204,000 - PR9
Nasa 97,000 - PR10
Yahoo 661,000 - PR10
I understand why Yahoo had a Pr10. I do not understand why NASA with 97,000 backlinks had a PR10 and Dmoz with 204,000 only had a PR9.
Was the algo that screwed up or was dmoz intentionally brought down or penialized?
Will this New algo and the additional links for dmoz bring back the dmoz PR10?
When you think about it there is very little *substantive* reason for people to link to the dmoz or yahoo front page as they are so broad, so they probably end up with lots of insignificant, "default" or "automated" links as a proportion. eg, a lot of begining or amateur sites may just include a yahoo home page link to fill up their page!
Just one of those things.
The "link" command will show you who is linking to that page, it has nothing to do with the site.
I'm going to be bad and post a nasa URL (honest, I don't run the nasa site) [sunearth.gsfc.nasa.gov...] that came up high on a search about the transit of mercury that happened the other day. If you go to that page and do a link: on it, you will see that it has a pile of links directly to that page from other sites.
These links to this page will increase that page's PR which it will then pass on to other pages on the nasa site.
That is deep linking, and that is how high quality content sites get most of their pagerank.
Is that just because they have more PR on average, or does Google allow a .gov site to pass on more of its PR to a linked site? I bet relatively few people on the planet know. However, if you do a google search for link:www.nasa.gov you get a ton of *.gov backlinks, although most of them come from *.nasa.gov.
No matter what, I'd still like to convince even a single .gov site of any kind to link to my little grey-barred site...
Is that just because they have more PR on average
The higher PR sites don't need google to cheat for them. Any time anything interesting happens in space, nasa pages gain more links, many of them from high ranked news sites.
The .gov sites are also contain a huge number of pages which gives them an extremely large amount of pagerank to send up to the home pages of their own sites.
The high ranking .gov sites do a lot of linking to each other, but not to a lot of sites outside the .gov world. When they do it is usually to .edu sites.
.edu sites have one thing going for them that not even .gov can claim. In addition to many of the advantages of .gov, they have alumni biograpies and resumes pointing at them.
They also do what every webmaster should be trying to do. They have interesting content. They have things that people *want* to link to.
i note that somebody at the latest pub confernece did say that the Google rep Matt Cutts confirmed that edu and gov sites do not receive an artificial PR boost as some thought. It is just that they deserve it themselves - earning it from their autority status and objective information - therefore attracting more *Natural* incoming links... => higher PR
Big Dave is also completely correct on the importance of deep links. The home page inherits all this PR if the inner pages link to it, or through sub-sections to the home page. Thanks Dave I forgot about that explanation.