Voyager Missions: 1 and 2

Voyager 1 and Voyager 2 were launched in 1977 to take advantage of a rare planetary alignment for gravity assists. Key facts:

• Launch: Voyager 2 on 20 Aug 1977; Voyager 1 on 5 Sep 1977.
• Grand Tour: Jupiter and Saturn flybys for both; Uranus and Neptune flybys by Voyager 2.
• Interstellar space: Voyager 1 crossed the heliopause in 2012; Voyager 2 in 2018.
• Golden Records: Phonograph records carrying sounds and images of Earth.
• Current status: Both continue to transmit data on the interstellar medium.

Note: This entry is part of a seeded demo to exercise version history.