Hey there Kerbal community, this is my first post, so sorry if this has already been discussed. I did a brief search but couldn't really find any specific example of my idea. I've been on board with KSP since .20 I believe. I learned more about rocket science and orbit & all in the first two weeks of this game than I had my entire life up to that point. In other words I absolutely love this game, and if there will ever be a problem in my marriage it will likely be this game Anyways to the suggestion, considering myself a novice/apprentice/proficient/distinguished player, what I really have absolutely no idea how to approach is the best chance to transfer from Kerbin orbit to an other planet. Some transfers are doable with some extra time toying with the maneuver tool (the adjacent orbit planets), but more than one planet away from kerbin, and I have extreme difficulty (i.e. ICAN'TDOIT) finding the appropriate time/opportunity to transfer my orbit. So what I propose is some SOME kind of system of notifying the player that her/his Jool/Moho/etc window-of-opportunity is coming up soon, or ending soon. I saw another suggestion with the idea of some kind of flight/trajectory *planning* (not autopilot) GUI, and thought that if something like that were implemented that a simple orbit transfer reminder of some sort couldn't be that big of a deal to include. Thoughts?