Showing posts with label Astronomy. Show all posts
Showing posts with label Astronomy. Show all posts

Wednesday, October 31, 2012

Astronomical Baloney


Astronomical  baloney often shows up unexpectedly. The other night, I was watching the first show (the pilot) of “Warehouse 13,” a SyFy Channel series now on DVD. In one scene, Pete, the hero, is gazing skyward into the night sky in South Dakota and says something about seeing Leo, Cygnus, and Sagittarius.  According to the online character profile, Pete “has extensive esoteric knowledge, including popular culture and astronomy.”

Most viewers probably didn’t know or care a fig about the constellations that Pete mentioned. However, it came into my ears like hearing a novice attempting to play the violin. Something was definitely off key.

So, I asked myself: Is it actually possible to see Leo, Cygnus, and Sagittarius at the same time? The answer is, not really.

Sagittarius is a summer constellation that is located by looking southward. Leo is a spring constellation that sets in the west by the time Sagittarius becomes fully visible. And, the constellation Cygnus is found in the northern half of the sky.

Obviously the writers were not intentionally making Pete look like one of those fakers who merely pretends to know something about astronomy, or who was randomly name-dropping constellations in a failed attempt to impress Myka. Because, if so, since she is the bookish one, having grown up in a bookstore, she would have spotted his balderdash and immediately challenged him. So, why did Pete name those three particular constellations? There is nothing that logically or visually connects them.

I suspect that it was the writers who were just randomly name-dropping constellations…. Just think: they could have chosen Cygnus, Lyra, and Aquila, the three constellations in the “Summer Triangle.” Or they could have name-dropped the three bright stars of the Summer Triangle: Vega, Deneb, and Altair. At least those names have logical and visual connections.

 Astronomical baloney also popped up in Leif Enger’s Peace Like a River, which I reread recently. I expected better of this author who, for many years, was a reporter and producer for Minnesota Public Radio.

The first astronomical blunder Enger made was on page 117 when he wrote that as evening fell, “Stars were appearing. Venus in the east.”  (Italics added.)

The immutable astronomical facts are these: Any time that Venus is visible in the evening, it is always seen in the west, never in the east. The only time that Venus can appear in the east is in the morning.

The second astronomical mistake Enger made was on page 224. Enger has Reuben seeing the “blue disk” of either Venus or Jupiter in the South Dakota sky just after midnight in the winter.  

Two problems. First of all, Jupiter does not appear to be blue; it looks more yellowish.  

Secondly, it would be impossible to see Venus at midnight in the winter in South Dakota. Perhaps south of the Arctic Circle in northern Alaska during the summer, you might possibly see Venus at midnight, because Venus is found during the twilight near the sun. This obviously could never happen in South Dakota in the winter.

A suggestion for Enger: The most noteworthy star in the winter skies suitable for determining general direction would be Sirius (found in the southern half of the night sky). Also, some easily spotted winter constellations can help with direction: Orion and The Big Dipper. Traditionally, the Big Dipper and the North Star/Polaris in the Little Dipper are used to establish the direction north. In the early 1960s (the timeframe of the story), every kid in Minnesota knew that. I knew that (I was there). Reuben, who was a kid from Minnesota, would have known that.

For some reason Enger seemed fixated on Venus: Two references to Venus – both of them inexplicable nonsense. Astronomical baloney.

Tuesday, September 21, 2010

Looking Up


Last night we set up the telescope on the front porch and looked at Jupiter and its four major moons. (Of course our view wasn’t like the above picture at all!!)


Jupiter is closer to the earth right now than it has been since 1963, nearly 50 years ago. If you go outside after 9 p.m. tonight and look toward the East, that very bright star—the only thing brighter will be the nearly full moon—is Jupiter. If you have really good eyesight, Uranus is a dim, bluish-green star, just above Jupiter—within the same binocular field.





Last night, the moons were actually lined up in a perfectly straight line with two moons on each side of Jupiter--similar to the above photo--only better!! Emily’s eyesight is pretty good (better than mine), and she could actually see the band across Jupiter--I could see a faint shadow.






By Saturday [Friday, actually!], all four moons will be clustered on one side of Jupiter.









Thursday, September 25, 2008

Favorite Astronomy Photos

Here are a few of my favorite astronomy photos:

This photo, "Quad Sky," was taken at the Great Salt Lake. Venus, the moon, and Jupiter (left to right) are above the people. The light on the right side of the photo is an airplane. The star Spica is also in the photo below Venus but you need a larger size picture to see it. (Try clicking on it for the larger size) The reason I liked this photo was that it was taken near here and because it conveys the peacefulness that accompanies stargazing.


Monument Valley and the constellation Orion. The brightest object on the left is Mars. The next brightest, in the center, is reddish star Betelgeus. Orion's Belt is lined up vertically. Lower and to the right is the Orion Nebula. Above and to the right of the Nebula is the bright blue star Rigel.


This solar eclipse photo was taken during the latest eclipse which occured in August this year. The bright dot to the left of the eclipsed sun is the planet Mercury.


Beautiful Saturn and its rings were photographed by the Cassini space craft in 2004.



This photo is of the "Giant Nebula" or NGC3603 and its stunning star cluster.


These nebula are known as "The Heart and Soul Nebula" located near the contellation Cassiopeia (the W shape).


This is the Orion Nebula. Can you spot the horsehead nebula in the lower left part of the photo?


Part of our local group of galaxies, Andromeda is our "sister" galaxy. Andromeda is found between Cassiopeia and Pegasus (or the Great Square) and can be seen with the naked eye in very dark skies. I had that amazing experience in New Mexico.


Two galaxies, a giant spiral, M81, and a dwarf irregular galaxy, Holmberg IX (that is its true name, I am NOT making this up!). This pair are located in the constellation Ursa Major which includes The Big Dipper.


Galaxy Abell 1689 is one of the most massive galaxy clusters known. The gravity of its trillion stars, plus dark matter, acts like a 2-million-light-year-wide "lens" in space. The gravitational lens bends and magnifies the light of galaxies far behind it. And this photo would be the equivalent of less than a square centimeter on the night sky.

Thursday, September 18, 2008

The OCD Astronomer (Me)

I must be a real pain in the neck to just about everyone I come in contact with. I am OCD (obsessive-compulsive) about details. When someone says or writes or does something that I recognize as incorrect or potentially incorrect, I instantly become fixated on that thing.

As you know from the previous blog, I have been watching the free astronomy course online. I pointed out in that blog one glaring error (at least to me it was glaring) that the professor made about the VLA. Well, I could not just shrug it off, I also went to his forum and politely pointed it out there in a post. When the professor posted his answers today, he had ignored my post. So I emailed him, politely noting that he had not mentioned my post in his post:

"You didn't respond to my remark about the VLA's location not being in Arizona, and about editing the first lecture to correct it to New Mexico. Is that not doable? Otherwise I am finding the lectures to be enjoyable. Thanks"

So he emailed me back and I was pleased that he had answered and acknowledged his mistake. So I put his answer on the end of my previous blog as a postscript for you to read. (See previous blog below.)


I then sent him another polite email to thank him for answering my email:

"Thanks for responding. I have now viewed 3 of the lectures. I was just getting ready to watch the next one, but the site was down. Time flies as I watch them. I also like your sense of humor. I told my husband that I think your mind is going so fast as you are lecturing that sometimes your mouth can't keep up. That is when you occasionally misspeak. Most of the time you catch it. Once in a while you don't--like most of us! Thanks again. PLH"


Later I began to watch Lecture 4. It was so-o-o-o-o-o elementary (and tediously so) on the motion of the moon, that I decided to skip it and move on to his latest lecture, number 5.

I was disturbed when, in Lecture 5, he misspoke at least twice more. I mean, I was HIGHLY disturbed. I began worrying about his students who would be tested on this lecture, and write down what he said, and then get it marked wrong on the test!

What to do??? Should I post the errors in the forum where others would see, including his students? Or should I again send a private email?

I decided to post my observations in his forum. This is what I said:

(First slip of the tongue:)
"During lecture 5, you apparently misspoke when you said, speaking about zenith and horizon, that 'if you go up on a hill, it [the horizon] can actually be less than 90 degrees' [from the zenith]. I believe you meant more than 90 degrees."



(Second slip of the tongue:)
"Also, with that triple photo of the position of the sun at summer solstice (at left), equinox (in middle), and winter solstice (at right), you said that the photos were of sunsets. However, they could not be sunsets, you must have meant sunrises."

I could not NOT attempt to correct these mistakes. It is going to make me crazy that hundreds of people will watch these lectures and believe every word. Or become very confused. And he is NOT able to correct them, he says.

I hope he responds in the forum to these mistakes, but, unfortunately, only relatively few will see the forum. It makes me crazy. During Lecture 5 he was making fun of the misinformation that circulates on the internet every August about Mars. I have had personal experience with two individuals in our ward who have rushed up to me to tell me what they just heard about Mars (which is incorrect nonsense). To correct the mistakes, the professor must do it verbally and on camera in subsequent lectures. Otherwise, his mistakes stand. Forever!

If I were the teacher, I would die of embarrassment to have my mistakes endlessly accepted as true by future watchers.

Tuesday, September 16, 2008

Free Astronomy Course

Today's Astronomy Picture of the Day (the link is over on the right hand side of The Thinker blog under the heading "Reasons to Wake Up Each Day") included a note with a link to a free Astronomy course produced by Michigan Tech. When you click on the note, you end up at The Asterisk forum page. On that page you will find the following:




I tried out each of the above URLs. Of course the top one is the most direct, and the one you should use. The second URL takes you to a page of all the science courses (114 of them, as I recall). The number one course listed is the free astronomy course from Michigan Tech. The third URL takes you to the LearnOutLoud home page which gives links to a zillion other courses.

So, using the first URL above, I got to the correct page. Then I needed to scroll down to the list of lectures. Today there were four available (the first 4 lectures of the course). So far, I have watched only the first lecture which was an introduction. The lecture lasts (I'm guessing) about 45 minutes. But the first fourth or third of the lecture was instructions to his real class members about tests and so on. You could skip that part by sliding the progress button over to the right about an inch or so.

Some of my grandchildren could probably watch these lectures and learn a great deal, if they were in a teachable frame of mind and equipped with a healthy curiosity about astronomy. I wouldn't let the "college course" label dissuade any of them.

The only thing that he said that caused my eyebrows to go up was when he said The Very Large Array was in Arizona. He must have misspoken. The Very Large Array is in New Mexico. I am going to check his forum pages to see if anyone else caught that. I may just email him and point out his slip of the tongue.
Postscript: This morning (9-18-08) I emailed RJN, the professor, about his gaff. Here is his reply:

From: RJN
To: plhorem
Posted: Thu Sep 18, 2008 5:29 pm
Subject: Re: VLA location

Thanks for your correction. Yes, indeed, the VLA is in New Mexico. I have even been there. Unfortunately, I can't correct the video. I can correct the PPT slide but that likely won't be used again for a number of years. - RJN

Saturday, September 13, 2008

Star Gazing Quickie

Some quick and easy things to spot in the West-Southwest if you have clear skies in that direction. Binoculars are essential to see the dimmer objects. Venus is the easiest to spot--no binoculars needed to find it!

The relative positions of the three planets and Spica on Sunday night and Monday night will not be as nicely spaced as in the above picture (forming a diamond shape).

The above picture shows their positions on Tuesday night only. If you go out to look on Sunday, Monday, Tuesday, Wednesday, and Thursday, you will notice changes in their positions every night! Wow!

To get a perspective on how positions change, the picture below shows their positions last Thursday. Venus and Mars were nearly touching! Or go to: http://www.skyandtelescope.com/community/skyblog/observingblog

In the blog about Venus, go down 4 paragraphs and click on Quicktime movie.