If then willing to extend the game to later years (house rulling), one would need an extended flyby schedule. Could someone create such for years 1987+? Note that this should be in the same style as in Leaving Earth, not the historical depiction.
The pattern is pretty easy to discern from the timeline cards. You can depart for Jupiter every other year, to Saturn every 3 years, to Uranus every 5 and Neptune every 6, If I'm not mistaken, the pattern should repeat itself every 30 years, so you could just reuse the cards; at the beginning of 1986, move your marker to 1956 and then add 30 to the year shown from then on.