5 Dollars - Elizabeth II Mars

Part of a planetary series issued by Cook Islands through the New Zealand-based Pacific Exchange Program, this coin was never intended for circulation — it exists as a licensed bullion-adjacent commemorative, a category Cook Islands has exploited aggressively since the 1970s under agreements that allow it to produce legal tender without any expectation of actual use. The face value is purely nominal against the silver content.

Mars exploration was a live news story in 2009: the Phoenix lander had confirmed water ice on the Martian surface the previous year, lending the subject timely relevance rather than purely abstract appeal.