Once the heat of the day has drained away, the air in the cove changes. The deck planks are still warm, but the coolness that settles over you comes down through the pines — a faint, resinous coolness laced with salt. The engine has long since fallen silent. When the generator goes off too, all that remains is the chain, tightening and slackening now and then. And it's in exactly that silence that a thin line slips across one corner of the sky — so fast you can't be sure you saw it. Then another.
On August nights, these lines are no accident. They have a name: the Perseids.
What Is Falling?
What falls is almost too small to call a thing at all. Every August the Earth passes through the trail of dust an old comet — Swift-Tuttle — has left along its orbit over the centuries. Most of that dust is no bigger than a grain of sand. But when it enters the atmosphere at tens of kilometres a second, it glows white for an instant, and we see it as a star coming loose. The shower takes its name from the point it seems to stream out of: the constellation Perseus. It builds through the first half of August and is at its most generous somewhere between the 11th and the 13th. But at sea you needn't hold out for an exact date; the nights on either side rarely send you away empty-handed.
Ashore, this is getting harder to see. The light of the town, the road, the marina washes the sky out, erasing everything but the few brightest stars. At sea, anchored in the middle of a cove, no artificial light is left around you. The darkness that opens overhead is in fact a full darkness: the longer your eyes adjust, the more it gives back.
When You Turn Off the Light
The secret of a good Perseid night is simple, but it asks for patience. First put out every light — deck lamps, cabin lights, even the phone. It takes a full twenty minutes for the eye to settle into the dark; for a while you'll see fewer stars, then all at once the sky grows crowded. The richest hours are usually after midnight, because only then does Perseus climb high. Lie on your back and don't fix on one spot, as the meteors appear anywhere across the sky. And remember: if the moon is large, the sky keeps some of its generosity to itself. The best nights are dark ones, when the moon rises late or not at all.
For a charter guest, the meaning of this is straightforward: the cove you choose to spend the night in can be chosen for the darkness of its night as much as the beauty of its day. Anchor not in a marina but in a bay away from the lights; kill the generator early; toss a few cushions onto the deck and wait. The tea is brewed, everyone goes quiet. The rest is up to the sky.
Another one slips past. Someone says "did you see it?" — but too late; that line has already gone out. The Perseids aren't watched to be counted, anyway. On a long summer night, on the deck of a boat that has taken its anchor, you tip your head back and wait — and the sky, every so often, whispers something to you.
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