Assuming that ships travel by accelerating until the halfway point and then decelerating until the destination, the formula for travel is:
turns = square root ( 8 * total distance / acceleration )
For an arc, nighbouring planets will take about a week of travel whereas a 200 unit distance which some of us are making to the centre of the galaxy will take close to three months.
Also I want to exterminate everybody else so I'm not going to alliance with randoms.
