The Sixth Fleet Bureau of Sciences website is a result of contributions from many different persons and entities, listed below in no particular order.
Daystrom Institute Technical Library: Various information and an image of the Inversion Nebula.
Wikipedia: Various information on stars and nebulae, as well as images of the nebulae.
Star Trek: The Final Frontier: Information on nebulae, and information and images for planetary classes.
A Note from the Director: The Sixth Fleet Science Bureau and all related text and images which have not otherwise been credited are the intellectual property of Sixth Fleet PBeM RPG. If you intend to use all or part of the information, text, or graphics contained in this bureau website, please be courteous enough to seek permission from the Director beforehand, and be sure to credit Sixth Fleet PBeM RPG appropriately.