We will have to escape eventually, because stars usually live for 10 billion years, and according to N.A.S.A the sun only has 5 billion years left, and that is not really that long away seeing as we have been here for 5 billion years. And we will have to escape atleast 1000 years before the sun explodes, because when a star explodes it creates a blackhole, and unless we can create a super rocket engine then we would never be able to pull away far enough from the milky way. Planets can be terraformed, but it would take about 90 years to terraform mars, and about 200 years to terraform Europa, Europa would be hard because it is constantly moving unlike mars which only moves one orbit in about 588 days. Do not worry, we will be long dead before we even take foot on saturn, let alone another galaxy. Maybe you should let future generations do the warp engine bit, unless you are desperate... i gather you have played on ferion?