Quote from: SM on Oct 25, 2012, 11:01:40 PM
Quote from: Eva on Oct 25, 2012, 12:57:58 PM
Ridley said some fun stuff about where the film took place just prior to release. I honestly don't know if he was just having a bit of fun with fan expectations or if he was confused himself.
The fact remains that Prometheus tells us that they arrive at a planetary system roughly 3.27*10^14 km from Earth. That calculates to roughly 34.5 light years. Zeta 2 Reticuli is located 39.2 light years from Earth. So, going from what we are shown in the film, the system cannot possibly be Zeta 2 Reticuli. It's off the mark by 4.7 light years, which equates to about 3 months of travel time in The Prometheus.
I think this is the biggest issue.
Hi Eva!
Well...it does depend on the degree of your suspension of disbelief. If you accept FTL propulsion for the Prometheus, than anything is possible. Unfortunately, this also raises the NOT INCONSEQUENTIAL problem of time-travel to a reference frame in the past...and all the potential paradoxes that would ensue.
However, if we limit the Prometheus to subluminal, yet relativistic travel (i.e., velocity at a high percentage of "c"), and using a quite reasonable assumption of 1g acceleration outbound, with a turn-around at mid-point, followed by deceleration at 1g, then here is the calculated time (proper-time, as perceived on-board the ship) versus the elapsed time on Earth:
Note that my calcs are based on General Relativity, and take into account the acceleration and deceleration maneuvers, versus a continous, constant speed (which is simply calculated based on the Lorentz equations of SR). So, to reiterate, this is a much more "realistic" scenario.
Again, I accept if the Prometheus is using FTL (magic) propulsion, then the calcs do not apply. However, without breaking the laws of Physics, the total ship-board travel time experienced by the Prometheus crew would be 7.3 years, whereas as the Earth-based (inertial) observers would experience a total of 41.4 years elapsed time.
If we allow the Prometheus to accelerate and decelerate at greater than 1g, then both the proper-time (ship-time) as well as the Earth-based elapsed time would be reduced.