日本的伊卡洛斯飞船和NASA的纳米帆-D太阳帆的成功发射和展开，已经展示了一个不用任何发动机就可以在太空中徘徊的关键方法。
The successful deployment and operation of the Japanese IKAROS and NASA's NanoSail-D solar sails have demonstrated a key method for getting around in space, without having to use any propellant.
现代太阳帆航天器的设计，如纳米帆- D或者日本的行星飞船IKAROS，是以很少但是持续的太阳光为推动力。
Modern solar sail spacecraft designs, like NanoSail-D or the Japanese interplanetary spacecraft IKAROS, rely on the small but continuous pressure from sunlight itself for thrust.
在这张不寻常的自拍照片，一台照相机按装在日本的伊卡洛斯飞船上，此飞船于6月15日与其主体脱离后，拍摄了第一张全部展开的太阳帆照片。
In an unusual take on a self-portrait, a camera aboard Japan's Ikaros spacecraft separated from the main body on June 15 to snap this first picture of the craft's fully deployed solar sail.
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