If you've ever picked a holiday destination by the stars — literally — astrocartographer Helena Woods has a seasonal tip: autumn is when the cosmic odds favour travel. Her reasoning, laid out in a recent Porthole Cruise piece by Lola Méndez, comes down to two planetary lines that astrocartography devotees plot on maps to guide where they go.

First up is Mercury, the planet traditionally linked with communication, logistics and planning. According to Woods, fall travel along your personal Mercury line should be unusually smooth: bookings, transfers and day-to-day trip admin all tend to click into place. Mercury is also associated with curiosity and learning, which makes it a good match for cruise itineraries built around discovery. Her suggestion is to check whether your Mercury line runs through Canada or New England — a classic autumn cruise corridor where leaf-peeping peaks and small coastal communities offer plenty to learn about. Onboard-adjacent excursions also matter here: look for shore days built around art galleries, museums and independent shopping, which suit Mercury's creative, inquisitive streak.

Venus is the other line worth chasing, and it's the one Woods calls out for anyone whose priority is genuine rest. Venus governs pleasure, beauty and unwinding, and she describes it as the most magical planetary influence for a cruise, especially in the fall. A Venus-line itinerary is your cue to switch off from work, linger on deck and let the ship do the heavy lifting on relaxation.

Geographically, Woods points travellers towards the Northern Hemisphere, where the Venus line might cross Alaska or Northern Europe. Timing there is specific: the tail end of the Midnight Sun season, when the endless daylight is fading but evenings are still long enough to balance time ashore with slow days on board. It's a sweet spot — fewer of summer's peak crowds, softer light for scenery, and a rhythm that suits a laid-back sailing rather than a packed itinerary.

For the uninitiated: astrocartography is the practice of overlaying planetary positions at your birth onto a world map, with each planet's "lines" supposedly colouring the places they pass through — Mercury for communication and learning, Venus for beauty and leisure, and so on. Whether you treat it as serious guidance or a fun filter for narrowing down a cruise, the practical advice here maps neatly onto good travel sense anyway. Book trips where logistics feel easy, choose itineraries that match your mood — curious explorers versus committed relaxers — and consider shoulder-season sailings like fall foliage routes in the Northeast or late-summer departures to Alaska and Scandinavia, when nature puts on a show and ships are calmer.

Who's this for? Cruisers who like a bit of cosmic framing on their planning, and anyone open to letting a birth chart break a tie between two tempting itineraries. Even sceptics may find the underlying structure useful: it's essentially a personality-based way to choose between a learning-focused voyage and a switch-off-and-float one.