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PR: 5
| Spacetransportation.org - http://www.spacetransportation.org Hugh science directory with more than 100000 listed science related websites from around the world. Submissions for science related authority sites are free. - More details |
PR: 5
| Spatial Energy - http://www.spatialenergy.com We offer high resolution images from all of the major commercial satellites. Imagery is available on demand from our large data archives, by tasking satellites and by speculative collection. - More details |