EXITING THE SOLAR WIND STREAM: Earth is exiting a stream of solar wind that sparked bright auroras on Sept. 24-25. More auroras are possible this weekend, but they might be hard to see through the glow of the Harvest Moon.
THE BEST HARVEST MOON IN FIVE YEARS: There's something special about tonight's full Moon. It's a Harvest Moon--closer to the autumnal equinox than any other full Moon of the past 5 years.
Above: The Harvest Moon of 2025 over Gardiner, NY. Credit: James Perez-Rogers
The equinox gives the Harvest Moon a special power: It rises near sunset for several nights in a row. Most full Moons don't do this. Before electric lights, farmers relied on this phenomenon. The bright Moon rising at dusk on consecutive nights gave them extra hours to bring in the autumn crops. Indeed, that's how the Harvest Moon got its name.
Harvest Moons have special colors, too. Rising at dusk, they are bathed in twilight hues while the lunar disk is often amber and swollen by the Moon Illusion.
This year's Harvest Moon on Sept. 26th is extra Harvest-y. It's closer to the equinox than usual: only 3.7 days later. The Harvest Moon can land as far as 15 days from the equinox. In the last decade, only 2018 (2.0 days) and 2021 (1.8 days) came closer than 2026.
Go outside at sunset, face east, and enjoy the Harvest Moonlight.
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THE ALIEN MIND SCULPTURE: The brains of octopuses are so different from ours, they're often called "alien minds." That makes the Alien Mind Sculpture more than a blown-glass paperweight -- it’s a fascinating conversation piece inspired by one of nature’s strangest and smartest creatures. Bonus: It has been to space:
You can have it for $149.95. On July 30, 2026, the students of Earth to Sky Calculus launched this sculpture onboard a cosmic ray research balloon. For 3 hours, it floated more than 105,000 feet above the Sierra Nevada mountains of central California while cosmic ray sensors inside the payload gathered data for our radiation monitoring program.
It comes with a full-color gift card showing the octopus floating at the top of Earth's atmosphere. The interior of the card tells the story of the flight and where it landed.
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