Vacations can be quite enjoyable. Visiting historic cities, lounging in the sun on a tropical beach, or snuggling up at a cozy mountain resort. But while the destinations are great, traveling itself can be a chore. Crowds, cramped flights, delays. It would be great if there were some short cut to our destination. Now imagine the vacationers of a galactic empire. It's great to visit the diamond shores of Exoticon 5, but nobody enjoys all that mucking about in hyperspace. So why not bring these worlds closer to home? That's the idea behind a study recently published in Monthly Notices of the Royal Astronomical Society. It basically looks at how a super-advanced civilization might pack a bunch of planets into the habitable zone of a single star.