Category Archives: Astronomy

Classroom Preparation

After taking some time off early in the summer, I usually go back go to my classroom for a couple of days in mid-summer to begin to get ready for the upcoming school year. This summer, that entails finishing some painting in my classroom.

During the summer of 2016, the school district that oversees my independent charter school did a compliance sweep of the entire campus. According to the district, all classroom walls MUST be bare within 24″ of the ceiling. In years past, my classroom walls were covered with posters, going all the way to the ceiling. This was due in part to my dislike of bare walls in a classroom, and my dislike of the “institutional white” paint prevalent in so many schools, including my own. Admittedly, the look that I had cultivated was a bit cluttered, but, at least, it was dense in an informational sense.

But, because my classroom was out of compliance, I had to make some changes. First of all, I stripped off all of the posters in my room at the end of the summer in 2016. This not only meant removing posters from all of the walls, but also from cupboards that were covered by rather cheap looking, old, white, foam board.

Second, with help from my school’s generous Booster Club, I commissioned a local artist, who had done other projects around campus, to design and paint a new look for my classroom. We decided to completely paint over the “institutional white” with a dark purple to mimic the night sky. Texture would be added with airbrushed stars.

The artist also began work on two major themed murals in the room. The first is a not to scale model of the Solar System along one wall, beginning with a highly detailed painting of the Sun in the back corner of the room. The planets were subsequently painted to scale in size in relation to the Sun, but not to scale in distance. Each planet includes some basic information such as mass, orbital period, and so on. The artist will finish this portion of the classroom with a description of how far from my room each planet would have to be in relation to the size of the painting of the Sun.

Below this mural, I decided to place the posters that I had originally taken off the walls, but I mounted the posters onto new foam board for portability. I have more posters than I have room for below the mural, even after culling the posters down from my original amount; so, I will rotate these posters throughout the year as units and themes change in my curricula.

The second major mural is a timeline of the Universe from the moment of the Big Bang to the present day. Right now, this mural consists of four major components with, at least, two more components to be done. That should be finished, according to the artist, by the time that school starts in a few weeks. Lastly, a couple of individual paintings on the dark purple background near the front of the room will be done to complete the new look.

As for my cupboards that I’ve previously mentioned, during the school year last year I had those re-covered with brand new, clean white boards. Subsequently, I re-postered those cupboards with a much cleaner look. I’m very happy with the results.

Although I’m not much of an artist, I can, at least, put base coats on bare walls, and I did some of that this summer to complete the painting over of the “institutional white.” Once again, I’m very happy with the results, and I expect the artist’s remaining mural work to be done soon.

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The view from the front door.

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The view from the front corner.

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Looking towards the front of the room.

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Looking towards the doors.

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The re-postered rear cupboards.

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The Sun.

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The Big Bang. More detail will be added.

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The large scale structure of the Universe.

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The Milky Way Galaxy to the stars nearby…

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…to the Solar System and the present day.

The Great American Solar Eclipse

The Great American Solar Eclipse of Monday, August 21, 2017 is now 29 days away. The eclipse is total, and the path of totality sweeps across the entire country from Oregon to South Carolina. If you’ve not seen a total solar eclipse, and you’re considering getting into the path of totality, do so. I cannot stress enough how incredible the experience is. A total solar eclipse is, perhaps, the most fantastic sight in nature. I’ve seen two totalities (1979 and 1991), and I’ve literally been waiting for this event for decades. I’m positioning myself near Madras, Oregon, where I will get about 100 seconds of totality.

For most of the lower 48 states, the eclipse will be partial, and will still be an enjoyable experience. Some school districts will already be in session on August 21, including my own (yes, I’ll be taking two days off from work). Here are a few tips on how to safely view the eclipse, and to get your students excited about the event.

In southern California where my school is located, the moon will cover about 62% of the Sun at maximum eclipse, which occurs at about 10:20 am PDT. The Sun will be too bright to directly look at, even at maximum eclipse, so safety is paramount. First of all, I highly recommend purchasing a pair of so called “eclipse glasses”. Go to My Science Shop (a subsidiary of Astronomy Magazine) to find these excellent wraparound glasses.

These wraparound glasses (I’ve bought six pairs for family and friends for our trip to Oregon) safely allow you to look directly at the Sun. They’re $20 apiece, and well worth it (you can also use these glasses to look at the Sun at any time, for that matter). You can also buy a 5-pack of these cheaper versions for $10. I prefer the wraparounds, though, for the extra safety and durability.

You can also observe the eclipse with some simple pinhole projections. Prepare your students ahead of time. Take some cardboard and punch some holes in it with a hole punch. Tape tinfoil over those holes and poke a hole in the tinfoil with a pin. Hold the cardboard perpendicular to the Sun’s direction. Cast the Sun’s image onto a piece of white foam board held behind the cardboard. I’ve attached a few photos from the partial eclipse of May 20, 2012, as an example. That eclipse, by the way, was an annular eclipse and, from my location, I observed about an 80% partial.

   

Another means of projecting is to tape cardboard (with the tinfoil pinhole) over the objective lens of binoculars, but with a wider pinhole. Cast the magnified image onto foam board. If you have a tripod, mount the binoculars to steady the image.

Tree leaves can act as a natural source of pinhole images. Especially at maximum eclipse, look for pinhole images of the near crescent Sun on the ground from sunlight filtering through the leaves. An example of when I observed such images projected onto a white wall is attached.

I’ll prepare my students and my substitute for the event the week prior. I’ll be doing these simple things in Oregon, as well as observing the eclipse, both partial and total, through a Dobsonian telescope with a solar filter.

Lastly, if you’re thinking about getting into the path of totality, take a look at this interactive Google map as an aid.

I wish you all the best in your endeavor to observe the eclipse, with or without students! As part of your preparation, a lesson plan and activity about lunar phases is helpful. You can find a version of my own lesson here.