 Google |
 |
|||
|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | hq.nasa.gov | 7 | 429000 | 23500 |
| 2 | amesnews.arc.nasa.gov | 6 | 3530 | 302 |
| 3 | blogs.usatoday.com | 4 | 1800000 | 66700 |
| 4 | nasa.gov | 9 | 4910000 | 35900000 |
| 5 | imagine.gsfc.nasa.gov | 7 | 43900 | 4010 |
| 6 | wupcenter.mtu.edu | 5 | 738 | 4360 |
| 7 | cosmos4u.blogspot.com | |||
| 8 | neeis.gsfc.nasa.gov | - | ||
| 9 | blog.wired.com | 8 | 2720000 | 76000 |
| 10 | all-science-fair-projects.com | 6 | 6120 | 16900 |
 Yahoo |
|
|||
|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | hq.nasa.gov | 7 | 429000 | 23500 |
| 2 | nasa.gov | 9 | 4910000 | 35900000 |
| 4 | blogs.usatoday.com | 4 | 1800000 | 66700 |
| 5 | exoplanets.jpl.nasa.gov | |||
| 6 | museum4kids.net | - | ||
| 7 | kidsciencelink.com | - | ||
| 8 | mynasadata.larc.nasa.gov | 6 | 1590 | 1100 |
| 10 | kidsolr.com | - | ||
| 11 | ohioview.org | |||
| 12 | imagine.gsfc.nasa.gov | 7 | 43900 | 4010 |
 Msn |
|
|||
|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | blogs.usatoday.com | 4 | 1800000 | 66700 |
| 2 | hq.nasa.gov | 7 | 429000 | 23500 |
| 3 | nasa.gov | 9 | 4910000 | 35900000 |
| 4 | mynasadata.larc.nasa.gov | 6 | 1590 | 1100 |
| 5 | school.discoveryeducation.com | 7 | 33200 | 9890 |
| 6 | aesp.nasa.okstate.edu | - | 677 | 774 |
| 7 | exoplanets.jpl.nasa.gov | |||
| 8 | imagine.gsfc.nasa.gov | 7 | 43900 | 4010 |
| 10 | science.nasa.gov | 7 | 180000 | 3750 |
| 12 | neeis.gsfc.nasa.gov | - | ||
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