Celestial Map which you can download at Celestial Map Resources, and some products at Idea , are available under the Creative Commons Attribution 3.0 Unported License and may be reproduced without fee provided they are clearly and visibly credited.
The credit must be presented in a clear and readable manner to all users by following rules and etiquette of your creative work industry.
If it's difficult to indicate credit on your product, please contact us in advance. In most cases, this will require payment.
Please Email to pr[at]hoshifuru.jp