Bad Astronomy

Bad Astronomy is kind of a catch-all book for astronomical misconceptions and myths. Philip Plait, the author, sets out to set the record straight a number of issues regarding astronomy. While Plait is a scientist, a man with a PhD, he doesn't write like one. The writing carries the Bill Nye enthusiasm with the college professor knowledge. Plait was, at the time of the book, a professor at Sonoma College.

Bad Astronomy covers a wide range of topics from egg balancing to the moon hoax and several other things in between. As mentioned above, the book does not drip with geek-speak. It's a very down to earth, nearly conversational in nature. I especially like that I could share fact from the book fairly easily. What's the point of reading a book if you can't enlighten those around you.

It all started with chapter one and the myth of balaning eggs only at the Spring equinox. Apparently there's a myth, on I was unaware of, that eggs can only balance at this time of the year. There's supposed to be some gravitational effect. So, often school kids get roped into testing this theory. Of course somebody succeeds, thus perpetuating the myth. The problem is, there's nothing special about the time of year. Given the right patience a steady hand, and the right egg, you too can balance an egg...any time of the year. My wife, brother, sister and I put this to the test over the Thanksgiving holiday. It worked of course. We just had to use the right egg.

Plait goes into a few other misconceptions, most notably the rotation of draining water and the color of the sun. When you ask somebody if they know anything interesting about drains, they'll most likely refer to the Coriolis Effect. The main point here being that drains swirl the opposite way depending on which hemishpere your in (Counter-clockwise up north and Clockwise down south). The Coriolis Effect is too weak and sinks/toilets/bathtubs too small for the Coriolis Effect to have any noticable impact. It should be noted that there is potential impact, but very small. In fact you would likely need to let the water sit for a week* or so then drain the container one drop at a time. When in comes to toilets, the water swirls solely because of the jets in an effort to keep that porcelien shine from becoming too marred, if you know what I mean.

What color is the sky? Blue of course. But why? Well it's not really blue and in fact a lot of people know that. They'll even get the answer partially correct and refer to the pollutants in the air refracting the light. They are correct that it's something in the air, but it's not the pollutants, it's the air itself. When the photons enter the atmoshere, much of the color gets delfected by the molecules in the air. The Reds and Oranges are affected the most. The Violets and Indigoes are affecte the least. The Blues have just the right wavelength that they scatter everywhere, but still make it your eye. They make it to your eye from every direction under the sun which causes the sky to appear blue. So, then what color is the sun? It's white. Most people assume is yellow, because the only time they can look at it is at sunset when it appears yellow. If it were possible to look at the sun directly during the day, it would be white.

Then there's the moon hoax theory. I admit that I dabbled into that territory in the past. I never became one of THEM though. Plait deals with this subject quite well and shares solid evidence and explanation for the veracity of the moon landing. A favorite of the moon hoax nuts is the lack of stars in the still pictures. This is easily explained by the fact that the shutter speed on the camera was short due to the amount of sunlight and the light from the stars was not strong enough to show up in the pictures. Another issue centers around the flapping of the flag, like it's being blown in the wind. What they forget is that without the atmoshpere the flag is more likely to flap because the lack of wind resistence. Any movment affecting the flag would be more exagerated.

While I never became a believer of the moon hoax, I studied in seriously enough to give it fair consideration. In the end, the offcial and sceintific explanations won out for me. They made more sense to start with. The key was their simplicity. Believing in a staged moon landing took more imagination and more effort. How was this pulled off without a single insider blowing the lid? Why did Russia not challenge the veracity of the event if the hoax is so obvious, as the believers claim? On the technical side, the effort to make it look real seems it would cost as much, if not more, to pull it off. Several years ago I saw some footage from the moon landing that settled things permanently (though my conclusion was already pretty secure). The footage was of the moon rover driving around the moon and I noticed two important things. First, I could see stars in the picture. They were faint, but I could see them (only a few at that). That's the benefit of a moving picture I suppose. The other thing I noticed was a perfect rainbow of moon dust kicked up by the tires. There was not a speck of dust floating in the air, just as if they were driving in a perfect vacuum. Not something that's easily created here on Earth.

That's the long and short of Bad Astronomy. It's a worthwhile read, especially with somebody who has a budding interest in astronomy. I think it's a good read for anybody, just to become familiar with astronomical phenomena. It's best to educate yourself so you don't fall victim to stupid ideas like the moon hoax. Below is footage from Mythbusters with their testing of moon hoax claims.





* I've seen estimates range from 2 hours to 3 weeks. I figure a week is a good middle ground.