The Postal Service issued five unique stamp panes celebrating space achievement and exploration in July of 2000. This special issue consists of the following panes: Probing the Vastness of Space; Escaping the Gravity of Earth; Exploring the Solar System; Landing on the Moon; and a fifth circular pane, Space Achievement and Exploration.
All the panes were printed by Sennett Security Products in the gravure process. 1.695 million panes of each were issued.
Postal Bulletin (June 1, 2000)