从国际空间站拍摄到的地球上方的渐亏凸月 The waning gibbous moon is pictured above the Earth's horizon from the International Space Station (© NASA)

从国际空间站拍摄到的地球上方的渐亏凸月 The waning gibbous moon is pictured above the Earth's horizon from the International Space Station (© NASA)

尤里之夜的凸月 A gibbous moon on Yuri's Night

International Day of Human Space Flight

Sixty-one years ago today Yuri Gagarin became the first human to see Earth from space, with a view likely similar to this image of the waning gibbous moon from the International Space Station. With a call of '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.

'International Day of Human Space Flight' is observed today by astronomy lovers of all nationalities, it becomes an international celebration held every April 12 to commemorate milestones in space exploration.

国际人类太空飞行日

61年前的今天，尤里·加加林（Yuri Gagarin）成为第一个从太空看到地球的人，其视角可能与国际空间站拍摄的这张月亮逐渐变圆的图像相似。喊着“波耶卡利！”我们在史上不到两个小时的时间里发射了“加加林”号宇宙飞船。

“国际人类太空飞行日”今天由各族天文爱好者庆祝，它成为每年4月12日为纪念太空探索里程碑而举行的国际庆祝活动。