Source: http://solarsystem.nasa.gov.License: All Rights Reserved.

It won't be obvious to anyone but type nerds, but I commend the designer for the atypical font choice on these stamps. No Helvetica or Copperplate Gothic or Myriad here; instead, the typeface is perhaps a little wink to those few who do notice:Galaxie Polaris.

Source: http://solarsystem.nasa.gov.License: All Rights Reserved.