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upright while bracing themselves against the ceiling with their hands. The ceiling of the lower
deck was just slightly taller than a person's height. Spending extended periods in such a
confined space can lead to feelings of claustrophobia, particularly during longer space
missions.
Thesis Report V-SPARC VIT
Figure 15 – Sky lab (Source: https://www.nasa.gov/media-tags/nasa-history/)
Figure 15 :Sky lab
Despite the absence of gravity, the workshop was designed to simulate its presence,
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maintaining a sense of local vertical to help users feel comfortable. This local vertical gave
astronauts a clear sense of up and down, aligning both themselves and the room in the same
orientation. They found the lower deck uncomfortable but viewed the upper deck as a
gymnasium.
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