Why the physics of The Expanse relies on the absence of weight
In short: Most science fiction treats space travel like aerial combat, with ships banking and turning like fighter planes. But The Expan/se embraces a much harsher reality: in the vacuum of space, there is no aerodynamics, no instant communication, and no weight unless you are actively accelerating.
The realism of the series, based on the books by James S. A. Corey, stems from its commitment to fundamental physical laws. Showrunner Naren Shankar, who holds a Ph.D. in applied physics and electrical engineering, utilizes his scientific background to ensure the spacecraft adhere to principles like the conservation of momentum and angular momentum. Unlike many sci-fi universes where ships maneuver using aerodynamic control surfaces, the vessels in this solar system 300 years from now operate in a vacuum where such surfaces are useless.
This adherence to physics creates unique narrative tension. For instance, the show highlights the reality that communication in space is not instantaneous. A significant dramatic beat occurs when a missile strike on Mars is only realized by inhabitants on Earth roughly 25 minutes after the event has actually transpired. This delay is a direct consequence of the speed of light and the vast distances involved in the setting.
The most iconic maneuver in the series is the 'flip and burn.' Because there is no atmospheric drag to slow a vessel down, changing course requires a ship to rotate its orientation and fire its engines in the opposite direction of travel. This method replaces the cinematic, plane-like banking seen in other shows, replacing it with a gritty, mechanical process of thrust-driven navigation. By embracing these constraints, the show avoids the 'fighter plane' tropes of World War II-style space combat, instead focusing on the raw, unyielding mechanics of propulsion and inertia.
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Sources
- Summary by Intellect · source: The Rocket Science of 'The Expanse'
- Also: How real-world science sets The Expanse apart from other sci-fi shows
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