"Gagarin was aware of the fears concerning zero gravity, and he also knew about all failed launches preceding his flight, " but he never showed any fear or doubt, Ivanovsky said.

“Gagarin清楚对于零重力的担忧，他还知道飞行之前所有失败的发射。” 但是他没有表现出害怕和疑虑，Ivanovsky说到。

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Sharon Christa McAuliffe received a preview of microgravity during a special flight aboard NASA's KC-135 "zero gravity" aircraft.

Sharon Christa McAuliffe受邀对美国宇航局的KC-135型模拟“零重力”飞行器进行测试。

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Koichi Wakata conducted the test-flight in front of the cameras this month as part of zero-gravity experiments submitted by members of the public.

本月，在公众的要求下，若田光一在镜头前进行了失重实验中的飞行试验。

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Mohamed was announced as a regional finalist and after a week of public voting was invited to Washington DC as a regional winner to experience a zero-gravity flight.

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Second place gets a free zero-gravity plane flight.

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It carries six passengers and two pilots, with nothing but identical window seats and transparent roof panels, since you will have the option of unbuckling and floating around the cabin during the zero-gravity portion of the flight.

FORBES: Out Of This World: Space, The Final Frontier