Why astrology is bunk

I know way too many otherwise intelligent adults who believe in astrology, and it really grinds my gears, especially right now, because I’m seeing a lot of “Mercury is going retrograde — SQUEEEE” posts, and they are annoying and wrong.

The effect that Mercury in retrograde will have on us: Zero.

Fact

Mercury doesn’t “go retrograde.” We catch up with and then pass it, so it only looks like it’s moving backwards. It’s an illusion, and entirely a function of how planets orbit the sun, and how things look from here. If Mars had (semi)intelligent life, they would note periods when the Earth was in retrograde, but it’d be for the exact same reason.

Science

What force, exactly, would affect us? Gravity is out, because the gravitational effect of anything else in our solar system or universe is dwarfed by the Earth’s. When it comes to astrology at birth, your OB/GYN has a stronger gravitational effect on you than the Sun.

On top of that, the Sun has 99.9% of the mass of our solar system, which is how gravity works, so the Sun has the greatest gravitational influence on all of the planets. We only get a slight exception because of the size of our Moon and how close it is, but that’s not a part of astrology, is it? (Not really. They do Moon signs, but it’s not in the day-to-day.)

Some other force? We haven’t found one yet.

History

If astrology were correct, then there are one of two possibilities. A) It would have predicted the existence of Uranus and Neptune, and possibly Pluto, long before they were discovered, since astrology goes back to ancient times, but those discoveries happened in the modern era, or B) It would not have allowed for the addition of those three planets (and then the removal of Pluto) once discovered, since all of the rules would have been set down. And it certainly would have accounted for the 13th sign, Ophiuchus, which, again, wasn’t found until very recently, by science.

So…stop believing in astrology, because it’s bunk. Mercury has no effect on us whatsoever, other than when astronomers look out with telescopes and watch it transit the Sun, and use its movements to learn more about real things, like gravity.

Experiment

James Randi, fraud debunker extraordinaire, does a classroom exercise that demolishes the accuracy of those newspaper horoscopes, and here it is — apologies for the low quality video.

Yep. Those daily horoscopes you read are general enough to be true for anyone, and confirmation bias means that you’ll latch onto the parts that fit you and ignore the parts that don’t although, again, they’re designed to fit anyone — and no one is going to remember the generic advice or predictions sprinkled in or, if they do, will again pull confirmation bias only when they think they came true.

“You are an intuitive person who likes to figure things out on your own, but doesn’t mind asking for help when necessary. This is a good week to start something new, but be careful on Wednesday. You also have a coworker who is plotting to sabotage you, but another who will come to your aid. Someone with an S in their name will become suddenly important, and they may be an air sign. When you’re not working on career, focus on home life, although right now your Jupiter is indicating that you need to do more organizing than cleaning. There’s some conflict with Mars, which says that you may have to deal with an issue you’ve been having with a neighbor. Saturn in your third house indicates stability, so a good time to keep on binge watching  your favorite show, but Uranus retrograde indicates that you’ll have to take extra effort to protect yourself from spoilers.”

So… how much of that fit you? Or do you think will? Honestly, it is 100% pure, unadulterated bullshit that I just made up, without referencing any kind of astrological chart at all, and it could apply to any sign because it mentions none.

Conclusion

If you’re an adult, you really shouldn’t buy into this whole astrology thing. The only way any of the planets would have any effect at all on us is if one of them suddenly slammed into the Earth. That probably only happened once, or not, but it’s what created the Moon. So probably ultimately not a bad thing… except for anything living here at the time.