Stage 11 hints
Stage 11 is an event puzzle, and for the theme of this cache there is one blindingly obvious event that celebrated its 40th Anniversary last year (see "Who Will Win The Race" for the cache I set to celebrate the fact). I also numbered the stages so that this would come out appropriately as number 11.
1°24'N 25°00'E are coordinates for Google Moon - click on the Saturn button in Google Earth and select Moon. It should take you to a crater named after a relation of mine.
The source clue tells you to look at the source of the cache page where you will find a link to the same crater.
All of which were clues to use star signs to solve the puzzle. They are also clues to confirm that you have the right solution to the puzzle (which is on Earth, not another planet), and to teach you about the other planets you can look at in GE, which will help on Stage 10..