This dimension groups spacecraft by the era in which they launched. Wikipedia notes that "only a handful of interstellar probes, such as Pioneer 10 and 11, Voyager 1 and 2, and New Horizons, are on trajectories that leave the Solar System," probes that themselves span several decades of launch history. Browsing by launch era lets a visitor compare spacecraft flown in the same period.
Facts
Comparison
Field Origin Era Launch Era
Sources
1. Wikipedia: Luna 1
Wikimedia FoundationLuna 1, lead sectionQuote, Luna 1, lead section
was the first spacecraft to reach the vicinity of Earth's Moon, the first spacecraft to leave Earth's orbit, and the first to be placed in heliocentric orbit.
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