"What-ifs" have fascinated onlookers and enthusiasts alike since the beginning of human spaceflight. Even today, a popular topic of discussion among spaceflight fans continues to be alternate space histories; for example, what if Michael Collins had flown on Apollo 8 rather than Apollo 11? What if Vance Brand and Don Lind had flown a Skylab rescue mission, or Brand had flown on Apollo 15 instead of Al Worden? Apple TV+ recently released an entire series based on Apollo-era "what-ifs," For All Mankind, which was reviewed in a previous issue of Ad Astra. While none of the aforementioned situations occurred, fate has changed the fortunes of many an astronaut or cosmonaut. The 2019 book Shattered Dreams: The Lost and Canceled Space Missions by prolific space historian Colin Burgess discusses some of the "what-ifs" that have occupied the minds of space enthusiasts throughout the last 60 years. Shattered Dreams runs the gamut from Vostok, Apollo, and Soyuz to the space shuttle, and showcases a wealth of diverse personalities who almost touched the stars but didn't quite make it due to bad timing, unpreventable personal circumstances, or a desire to move on to other ambitions.
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机译：自人体空间开始以来，“什么 - 如果是什么意义的”是着迷的旁观者和爱好者。即使在今天，航天风光风扇之间的流行讨论议题仍然是备用空间历史;例如，如果迈克尔柯林斯在阿波罗8而不是阿波罗11岁的地方飞行了什么？如果Vance品牌和Don Lind飞过Skylab Rescue使命，或者品牌在阿波罗15而不是Al Worden？ Apple TV +最近根据Apollo-Era“What-Ifs，”为所有人类发布了整个系列，该系列是在Ad Astra的先前问题中审查。虽然没有上述情况发生，但命运已经改变了许多宇航员或宇航员的财富。 2019年预订破碎的梦想：多产空间历史悠久的空间任务历史学家Colin Burgess讨论了过去60年来占据了空间爱好者思想的一些“什么”。破碎的梦想从Vostok，Apollo和Soyuz运行到航天飞机，并展示了丰富的各种各样的个性，几乎触及了星星，但由于时间不好，不可抗求的个人情况或移动欲望，并没有完全成功对其他野心。
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