The Soundtrack to Space Exploration

After 15 years of diligently exploring the surface of Mars, the Opportunity rover finally succumbed to the elements and went offline Feb. 13. As obituaries and tributes to "Oppy" surfaced, fans caught a glimpse into the robot's final moments: the last picture it sent, its last words, the last-ditch attempts to revive it. Scientists wept as they said their final farewells. As employees swayed and embraced, mission control sent one final transmission to Oppy: Billie Holiday's 1944 recording of "I'll Be Seeing You." The muted, intimate timbre of Holiday's voice helped millions say goodbye to "the little robot who could": I'll find you in the morning sun, I'll be looking at the moon, But I'll be seeing you.