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A young woman's murder causes the subjects of a century-long mission to populate a new world to question the true nature of the project as they approach the point of no return.

To approximate the gravity of Earth, the engines would need to provide a constant acceleration of 9.81m/s2. At this acceleration, the ship would reach 97% of the speed of light in just 2 years and the journey to Proxima Centauri (Ascension's quoted destination) would take roughly 5.2 years. In the show, the ship has apparently been en route for over 50 years, almost 10 times as long as the journey should take.

Such a speed would not be possible for a ship of this type in any case, as it would need a huge shield against interstellar material and an impossibly large fuel load.

All of this is simple math and physics and could be questioned by any reasonably well-educated person in the 1960s; it's inconceivable that none of the crew or other people on board would not have questioned this inconsistency. See more

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Ascension (TV Mini-Series 2014 ) - IMDb