What’s a Supermoon?

For 15 years, In&Out Magazine has been the definitive source of “Everything that’s going on” in and out of the community. We thank you, our readers, as well as the businesses that support the magazine through advertising, for that opportunity. But with little going on, and many businesses suspending or canceling their ads during the Covid-19 crisis, we are suspending publication of the magazine and web sites for the month of May. 


supermoon and airplane
An airplane flew in front of a supermoon as it rose over the LBJ Presidential Library Nov. 14, 2016, in Austin, Texas. Photo by Jay Godwin

There have always been supermoons. They just didn’t used to be called that. In fact the origin of the term is, shall we say, unconventional. Here’s how they work:

The moon’s orbit around Earth is not a perfect circle. The moon is, on average, 238,855 miles (384,400 km) from us, but the distance varies by 26,465 miles. When a full moon happens while the moon is at or near its closest point to Earth (called perigee) it’s called a supermoon. The exact timing and proximity dictates just how super.

A supermoon can be 14 percent bigger and 30 percent brighter than a full moon occurring at its farthest point from Earth (apogee).

supermoon size comparison
The biggest supermoon, as seen from Earth, is compared to the smallest it appears when farthest from us.

Supermoon is a catchy term, and a supermoon can be notably bigger to a casual observer, but don’t expect the moon to be dramatically gigantic (photos that make the moon look positively gargantuan involve telephoto lenses and strategically located foreground objects). But do take the opportunity to go out and look up. Any full moon, hanging huge on the horizon, is a worthy sight—a supermoon is just a little worthier.

And while you’re out there—during any rise of the full moon—check out the moon illusion. The moon will look larger on the horizon than when it’s higher in the sky. This is, in fact, all in your head (really!).

Oh, and about the origin of the term. According to NASA, the term “supermoon” was coined in 1979 by astrologer Richard Nolle. Astrologers and astronomers don’t usually see eye-to-eye on the meanings of heavenly objects and occurrences, but on this one they’ve come to agree, at least on terms.


Help Save Our Community
Small businesses are the lifeblood of our country and even more so this community. Supporting local businesses during this crisis can help keep our community economically viable. Please strongly consider supporting the businesses below, In&Out Magazine's display advertisers, as well as those in the Classifieds section of the magazine (see the full April 9 issue in PDF form). Many of these businesses have been part of the fabric of this community for two decades, not just serving our professional, service and retail needs but stepping up to support local charities, sports teams and so much more. Tip: If you know you’ll need to schedule a service, consider contacting a local business you trust and paying the standard fee for the deferred service. The links below go to their web sites.

Adult & Pediatric Allergy Associates • 602-242-4592
Anthem Senior Living • 602-909-9550
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Kodiak Roofing • 602-501-7717
Luv My PC • 480-703-6609
Merrill Gardens • 623-201-4881
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Preferred Business of Anthem • 623-551-0523 
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RE/MAX Professionals - Mike Higgins • 623-640-7502
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SonoranScapes Landscaping • 602-842-9948
State Farm Insurance - Justin Simons • 623-551-3700
Storage at Anthem • 623-226-8634
Sunset Cabinets • 623-687-6579
Thompson & McGinnis Attorneys at Law • 602-952-2666
Titan Tree Care • 623-444-8448
Titan Pest Control • 623-879-8700
Wyman Plumbing & Mechanical • 623-551-6688

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Robert Roy Britt
NoPho resident Robert Roy Britt has written for In&Out publications since its inception in 2005. Britt began his journalism career in New Jersey newspapers in the early 1990s. He later became a science writer and was editor-in-chief of the online media sites Space.com and Live Science. He has written four novels. Email the author.
Robert Roy Britt on Email

Robert Roy Britt

NoPho resident Robert Roy Britt has written for In&Out publications since its inception in 2005. Britt began his journalism career in New Jersey newspapers in the early 1990s. He later became a science writer and was editor-in-chief of the online media sites Space.com and Live Science. He has written four novels. Email the author.

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