Earth from the International Space Station, photographed by astronaut Jeff Williams

© Jeff Williams/NAS

In orbit for Yuri's Night

Sixty years ago today at around 9 a.m. Moscow time, Yuri Gagarin became the first human to get a view of Earth from space (like this one captured from the ISS by astronaut Jeff Williams). With the famous utterance 'Poyekhali!' ('Off we go!'), Gagarin launched into low Earth orbit in his Vostok 3KA spacecraft, making history in less than two hours with a complete trip around the planet. Landing in rural Russia, he became an instant worldwide celebrity—that is, after convincing puzzled locals he was a comrade and not a space alien.

Of course, with elation came deflation: Gagarin's flight dashed NASA's hopes of making an American the first person in space. But the Soviets' success kicked the Space Race into high gear, setting the stage for a spate of U.S. spaceflights and eventually that first trip to the moon. Now that competition in spaceflight is less bitter, 'Yuri's Night' is observed today by astronomy lovers of all nationalities, celebrating how space exploration can unite the world.