2017

The video effectively uses dramatic visuals and a compelling narrative about a scientific mission's sacrifice to protect potential extraterrestrial life. The "what if" scenario of contamination creates a strong emotional hook, while the detailed facts about Cassini's journey and demise provide educational value.

The video details the final mission of the Cassini spacecraft, which was deliberately plunged into Saturn's atmosphere in 2017 to prevent potential contamination of moons like Enceladus and Titan. This decision was made after a 13-year mission that yielded vast amounts of data and images, and after the spacecraft exhausted its fuel.