The U.S. Postal Service has issued a new set of stamps celebrating 10 years of sun-watching from the National Aeronautics and Space Administration’s (NASA) Solar Dynamics Observatory (SDO).
NASA, USPS team up to create stunning sun stamps
The U.S. Postal Service has issued a new set of stamps celebrating 10 years of sun-watching from the National Aeronautics and Space Administration’s (NASA) Solar Dynamics Observatory (SDO).