7.8 million dollars for artificial gravity sets in the movie 2001

Stanley Kubrick invested $750,000 ($7.8 million in 2024 dollars)
significant for its time on the set for the artificial gravity scenes
in 2001: A Space Odyssey.

This set was critical for creating the iconic scenes inside the
spaceship's carousel, where it appeared as if the actors were walking
vertically up walls due to artificial gravity.

The set, a 27-metric-ton, vertically mounted structure, was 38 feet
(12 meters) in diameter and 10 feet (3 meters) wide. It could rotate
up to 3 miles per hour (4.8 km/h), simulating the gravity-like effect.
The rotation allowed the actors to walk along the inside of the set,
creating the illusion of zero-gravity transitions to artificial
gravitya core aspect of the film's realism.

Although Kubrick's portrayal was based on the assumption that
astronauts would learn to transition between zero gravity and
artificial gravity easily, scientific experiments suggested it could
be more complex.

Beginning in 1958, experiments by the Naval Medical Research
Laboratory using a 30-foot (9.1 m) centrifuge revealed that it took
several days for subjects to adapt to the Coriolis forces and motion
sickness, challenges that Kubrick did not emphasize in his film.

Kubrick's meticulous attention to detail, combined with scientific
influence, helped create one of the most visually groundbreaking and
realistic portrayals of space travel ever seen on film.
 
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