While creating the site the following source of information were used:

  1. The encyclopedia for children. V. 8. Astronomy. E68 /The editor-in-chief is M.D. Aksenova. - M.: Avanta+, 1997. - 688 p.: il.
  2. The big Kirill and Mefodi's encyclopedia 2000. (CD version).

Author's rights are applied only to the english version because the translation (from russian) was made by the site creators.

Copyright © Korzhov - Sechenyh