43.1610° N, 77.6109° W

Today, on this big spaceship called Earth, we are all participating in the summer solstice. It doesn’t matter where in the northern hemisphere we are, it started at dawn and will run until a very late sunset. The northern pole of our planet is tipped the full 23.5 degrees toward the Sun. Seen from the latitude and longitude above in Rochester, NY (and elsewhere) our parent star is as far north in the sky as it ever gets. As the planet turns the Sun’s path below our horizon is very short. This day is the longest of the year and consequently our night will be the shortest of the calendar year. Bad day for astronomy devotees!

If you are a stargazer (or stargeezer, as in my case) and live above the Arctic Circle you will have no starry night this time of year. Right now, in the far north, the Sun never sets. Many people flock to destinations in Alaska and the Yukon to partake in this event. In their devotion they remind me a little of the ancient Druids at Stonehenge. Solstice tourism has seen a spike in recent years and I’ve considered going myself. And at an opposite extreme, if you are based in one of the many Antarctic outposts the night of June 21st will last a full 24 hours.

The summer solstice is the time of year when the Sun stops its northern ascent, pauses, looks around, and then trudges downhill again. It’s interesting that the word solstice comes from the Latin sol-stitium. This word literally means “sun-standing.”

Venture outward tonight into those short hours and look at the stars. Unlike the wintertime we can go out in tee-shirts and relax in lawn chairs. If the mosquitoes aren’t biting we might catch a meteor or two and see a few satellites stray past overhead. All while we enjoy a cool drink.

Happy Solstice, everyone!

 

(Note on illustration: “Stonehenge at Solstice Dawn” from the book Astronomy: The Cosmic Journey by William K. Hartmann, 1978, C. Wadsworth Publishing Co.)

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