Why can not you improve the FSD travel?

[Mohrgan]

He's talking about having a planet between Alpha and Proxima. When you fly around in SC, you may notice the Slow Down sign near objects, it refers to a planet/whatever lowering overall top speed. Although, it is not a gravitational effect, as ships slow as they approach massive objects.

A planet's gravitation will affect a craft differently when moving towards the body, or when moving away. As you travel towards the planet it's gravitation will pull you along, increasing your speed. The "Slow Down" warning your ship gives, is a notice that something's gravity is affecting your navigation. As you pass the planet, its gravity will slow you down, as it attempts to pulls you towards it's center. All of this works correctly in SC.

Your ship will only slow approaching a planet if you have it locked as a target, and your throttle is in the blue zone. This is part of the navigation aspects of your ships computer, not because of any natural effect of gravity.