I've been concerned about a couple of things in the Alien movies (and space movies in general): space travel and communication.

There was already an old thread about this before (

https://www.avpgalaxy.net/forum/index.php?topic=5283.15), but I'm opening the discussion again.

So, first of all, a question related to communication: how fast does a message travel in space? for example, there is a distance of 59 light years between Thedus, the starting point of the Nostromo, and Earth, how long did the message take to travel between these points.

Another question concerns the speed of the Nostromo:

The length of the Nostromo's entire journey was 59 light years, and the journey from Acheron (LV-426) to Earth was 39 light years. In the film, Lambert says the journey from LV-426 to Earth will take another 11 and a half months (6 weeks plus 10 months).

This means that the Nostromo's traveling speed is 46,586,930,357 km/h, or about 432 times the speed of light, if I calculated correctly.

In the final screenplay, Dallas orders the travel speed to be the speed of light plus four, i.e. 5 times the speed of light. At this speed, it takes Nostromo 7.8 years to travel from LV-426 to Earth, this is a different size class than Lambert's travel duration estimate.

This now raises a lot of questions, for example about traveling at the speed of light many times, time warping, etc. this is also related to the first question about the speed of communication, does communication travel slower

like people on spaceships?

On top of that, in the movie Aliens, Sulaco traveled that 39 light years in a couple of weeks, and Hicks said the rescue team would arrive in 17 days.. although the starting point is unclear. The entire travel time of Sulaco is as unclear as a xeno egg on Sulaco.

In the Alien 3 book it is mentioned that the journey from LV-426 to earth takes years, this is probably the most accurate travel estimate of all.