Instructables

3d Nocturnal Celestial Stardial TJT5/6

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A Nocturnal Celestial Stardial is best when it's a solid archival material. As such it makes a fine heirloom or engagement present. Time-Journey Tool 5 of 6 is an accurately functioning instrument.

Nocturnal Celestial Stardials were originally called "horologium nocturnum" (time instrument for night), or nocturlabes. Sundials work great, but only during the day. Nocturnal Stardials tell time at night by measuring the stars. The dials move. It works like a charm. It needn't even be configured to longitude and latitude like a sundial.

This long-forgotten instrument aided a few lucky navigators and charmed romantics of the Renaissance. Earliest references include Cosmographicus Liber in 1530, Arte de Navegar, in 1551, and Horologiographia, The Art Of Dialling in 1626. 'Twas rare then as now. 

The outer disc is marked with the months as well as an indicator for each of the 365 days of the year. The inner disc is marked with hours and 5-minute increments. The pointer rotates on the same center axis as the discs. The center axis has a sight hole through which the North Star Polaris can be aligned.

In the northern hemisphere, all stars will appear to rotate about the North Star, aka Polaris. The North Star is very close to the north celestial pole, but about 434 light years away.

The time can be read on my Nocturnal Stardial from any of three reference constellations: Big Dipper (Ursa Major), the Little Dipper (Ursa Minor), or Cassiopeia.

Recommended Materials and Processes:

 Computer with internet access
 3d modeling software (or download my 3d model for free)
 access to 3d printer (I use Shapeways.com)
 
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ravenking2 years ago
OMG! I want this!
poofrabbit2 years ago
As I said in your last 'able I had never heard of such a thing. I've been wanting a 3D printer so bad I could taste it, and this looks so so so cool!! Great 'able and again thanks for sharing this amazing tool!
TimeJourneyTools (author)  poofrabbit2 years ago
I like your paper art. I wonder if you're a teacher and/or artist.

Yup once one of us get a 3d printer we need to share and/or collaborate!
I like this plan! :) I am an artist who became an art teacher. :) I have a BFA and an education degree. I really dig working with kids, and when I was younger and going to school I never would have dreamed this is the role I would find myself in. However, it allows me to create my own work (someday perhaps I will post that stuff) and kick back and get to stay a kid at heart and instill the passion and love for art in all fields of study to young minds. I'd do it for free, but I am happy they pay me, art supplies are expensive! LOL
TimeJourneyTools (author)  poofrabbit2 years ago
I teach art to kids at my mom's Montessori school one day a week. I'd be into brainstorming on lessons/projects someday.

One idea I had regarding this stardial was to make a whiter/more basic design so kids could assemble & color/design their own.
That sounds like a fantastic plan! What age of kids are you working with? Could it be made using balsa wood? It's light weight, and cuts very easily with an exact-o knife. Of course that would have to be much older children, or precut wood forms they could sand. Humm, with clay it would shrink 20%, so that might not work. A thin plastic might work out. Where I live we have a factory that makes plastic parts for medical equipment, and they are very generous and will give us scraps. We have made plastic bats for wheel throwing and many other things for the classroom, you could always check out things like that. Something solid however, using a basic design would be so cool because it could be something they would keep. My wheels are spinning. :)
TimeJourneyTools (author)  poofrabbit2 years ago
it's a shame there's not a really cheap metals clay, like (Precious Metals Clay). I'm working with 5-8 year olds. Today we made the paper versions. I printed them, they colored them in. I made a version with all the color and shadows pretty much stripped out. They cut them out and we assembled them with eyelets. The tool and 100 eyelets only cost about $7. bucks at Hancock Fabrics, formerly Joann Fabrics.