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A centrifuge is a device designed to create artificial gravity by spinning rapidly, causing outward force that simulates gravity. In Project Hail Mary, the spacecraft is constructed as a massive centrifuge to generate gravity-like conditions aboard the ship. By spinning two segments connected by cables—a habitation module and fuel section—the centrifugal force creates Earth-like gravity. While the concept of centrifuges and artificial gravity through rotation is scientifically real and actively explored in aerospace engineering, the specific large-scale centrifuge as depicted in the novel is fictional.
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Centrifuge Term Timeline in Project Hail Mary
The timeline below shows where the term Centrifuge appears in Project Hail Mary. The colored dots and icons indicate which themes are associated with that appearance.
Chapter 2
The unnamed man wonders whether he is in a large centrifuge, which is spinning to create artificial gravity. Determined to test this hypothesis scientifically, he fashions...
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Rejecting the centrifuge theory, the unnamed man concludes that he’s neither on Earth nor in any known centrifuge,...
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Chapter 8
...cannot be reliably converted in time. Instead, she proposes an alternative: artificial gravity through a centrifuge. Ryland immediately understands her meaning, explaining that the ship could be split between the crew...
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After some deliberation, Stratt concedes that the centrifuge is the best option. Lokken prepares to leave, intending to submit the proposal to a...
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Back in the present, Ryland’s realizes the Hail Mary is a centrifuge. He finds the relevant control panel and confirms the ship’s ability to separate and rotate....
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With the centrifuge engaged, Ryland retrieves the alien cylinder, now cool enough to handle. Testing its properties, he...
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Chapter 16
Ryland restores artificial gravity by spinning up the ship’s centrifuge. Rocky, now safely inside his xenonite habitat, experiences Earth gravity for the first time and...
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Chapter 20
The ship spins out of control, crushing Ryland against a broken console as the centrifuge generates dangerous g-forces. With great effort, he crawls to the navigation panel and manually extends...
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Chapter 24
...sooner rather than later. They rig up a controlled spin and manage to engage the centrifuge without a repeat of Ryland’s earlier blackout. With gravity restored, Ryland launches into a week...
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