
The Farmer’s Almanac says that the July Full moon is known as the Buck Moon because that’s when the antlers of male deer are in full-growth mode. It’s officially full today (July 10) at 4:37pm EST, and if you watch it rise you’ll see it appear bigger due to the “Moon Illusion,” a phenomenon that occurs when the moon is close to the horizon.
Go out on the night of the full moon and find a good spot to watch it rise. It can be breathtaking, eliciting an awestruck “Wow!” from any skywatcher. When we observe the Moon near the horizon, it often looks HUGE – whether it’s peeking over the shoulder of a distant mountain, rising out of the sea, hovering behind a cityscape, or looming over a thicket of trees.
But here’s the thing: it’s all in your head. Really. The Moon’s seeming bigness is an actual illusion, rather than an effect of our atmosphere or some other physics.
…Photographers can simulate the Moon illusion by taking pictures of the Moon low on the horizon using a long lens, with buildings, mountains, or trees in the frame. So, remember when you see dazzling photos that feature a giant Moon above the landscape: those images are created by zooming in on distant objects near the ground. In other words, the Moon looks bigger in those photos because it’s a zoomed-in view.
kare hav took this photo of the July full moon rising over the Renaissance Center in Detroit back in 2018. The low blue lights on the right are Comerica Park, and the new Hudson Building would be right about where the moon is! See more in their Detroit gallery on Flickr.









