Alterian Dollar

The symbol for the Altairian dollar from the game

The Altairian dollar is the principal medium of exchange throughout the Milky Way galaxy, partly due to the general incompatibility (and/or illusory nature) of most other forms of currency. According to The Hitchhiker's Guide to the Galaxy, a competent hitchhiker should be able to see the galaxy on less than thirty Altairian dollars a day, although costs around the Guide's headquarters make this, ironically, almost impossible.

It is based - or at least originated - on the planet Altair.


It is mentioned several times in The Hitchhiker's Guide to the Galaxy series by Douglas Adams, such: