Rolling a die and checking a table seems very 1970s to me. So here are the events in card form. Of course, I had to add a few extra events of my own.
Draw a card from the deck every turn. But don't worry, half the cards are non-events.
When you hit Senility, reshuffle the deck for the next Solar Cycle.
The Mission deck is treated like the Colonist deck. A new "Mission Planning" op allows you to choose 1 of the top 3 cards and put it up for auction.
Victory points are awarded only for completing Mission cards from your hand.
Missions are an excellent way to teach HF3 to new players since there's no require-ment to build factories.