The Not So “Super Moon” (expanded post)

Posted: December 3, 2017 in Humor, Journalism, Psychology, Science, Skepticism
Tags: , , , , , , , , , , ,

(For the last few months we’ve been running the best posts from years past, posts that will be new to most of our subscribers. This is an expanded version of a post from 2014. We’ll be posting more blasts from the past for the next several months, and will intersperse them with new material.)

* * *

The media is abuzz, and friends have been calling me, about the so-called Super Moon. We’re having one tonight, and according to the excited local media (TV weather forecasters) we’ll be having two more in January. Wow! . . . Well, maybe.

In reality, there’s nothing to get excited about here, folks: the (full) moon will be at perigee (its closest point to the Earth) and about 14% larger in diameter than it is at apogee (its farthest point from the earth), and only about 7% larger than the full moon is on average.

As regards brightness, the moon at perigee is about 30% brighter than at apogee, and about 15% brighter than average. Sounds impressive, doesn’t it? — until you realize that the eye’s response to increases or decreases in brightness is far from linear, and that the sun is approximately 400,000 times as bright as the moon. Thus, the average ratio of the sun’s brightness to the moon’s is about 400,000 to 1, and the ratio of the sun’s brightness to the “Super Moon’s” is about 400,000 to 1.15.

So, if they didn’t read the hype, and hence didn’t expect to see something, very probably 99% of people wouldn’t notice these rather subtle differences in the moon’s appearance. And the other 1% would be amateur and professional astronomers who’d be aware of them, but wouldn’t get excited about it.

There are lessons to be drawn from this.

As Oscar Wilde put it in The Critic as Artist, “[Journalism] keeps us in touch with the ignorance of the community.”

And as Wilde put it so well in The Soul of Man Under Socialism, “[T]he public have an insatiable curiosity to know everything, except what is worth knowing. Journalism, conscious of this, and having tradesman-like habits, supplies their demands.”

There’s very little to add other than that journalism has advanced significantly since Wilde’s day and now manufactures things not worth knowing.

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