The Republic of Palau is an island country in the western Pacific, in free association with the United States. In one way or another, the country has been under US administration since it was established, and has never had its own separate currency - it has always used the US Dollar. However, Palau allows some foreign mints to issue coins under its authority; these are denominated in US Dollars but are only legal tender in Palau, so can in a way be considered to be in "Palau Dollars", even though such a currency does not officially exist.
The coins are usually dedicated to historical or general popular culture themes not related to the country itself. Many of them are in standard bullion sizes, including the large three troy ounces (3oz) of silver format.
The Mint says about this coin:
The Universe coin is the first issue in the Space; the Final Frontier series.
The Universe in astronomy, or the cosmos in cosmology, are synonyms for all matter and energy within the entire spacetime continuum in which man evolves. Current science assumes that the Universe was formed as described in the Big Bang Theory, which states that the Universe originated approximately 13.75 billion years ago.
Belgian astronomer Georges Lemaître introduced the Universe theory in 1927, which said that distant galaxies are red-shifted. Two years later, the American astronomer Edwin Hubble found experimental evidence for Lemaître’s theory. Hubble proved that all galaxies are moving away from earth at speed proportional to their distance from Earth, a physical law now called Hubble-Lemaître’s Law. This fact implies a primordial beginning from a certain point, and in 1931 Lemaître hypothesised that the Universe must have arisen from the explosion of a “primordial atom”.