An image of science in the abstract, the spirit of science as imagined at the dawn of the Space Age, from the National Postal Museum, part of the Smithsonian Institutions.
From the description page there:
This Science Issue stamp honors the sciences and commemorates the centennial of the founding of the National Academy of Sciences. The organization serves as advisers to the nation on science, engineering, and medicine. The stamp features an image of an astral belt over a globe.