This dimension names the wider program a spacecraft's mission was flown under. Wikipedia notes that reusable examples include "the SpaceX Dragon and the Space Shuttle orbiters," spacecraft that flew many separate missions across the life of their program. Browsing this way groups every spacecraft that flew under the same program.
Facts
Comparison
Field Origin Era Mission Of
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Sources
1. Wikipedia: Sputnik 1
Wikimedia FoundationSputnik 1, lead section (satellite subcategory)Quote, Sputnik 1, lead section (satellite subcategory)
It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957 as part of the Soviet space program.
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