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 Post subject: Andrews Hall Grand Orrery - CU Boulder
PostPosted: Mon May 07, 2012 7:04 pm 
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Hey everyone,

I just finished a massive project that I've been working on for about a year now, with a team of 7 other engineering students.

On May 6, 2012, we unveiled the Andrews Hall Grand Orrery. It is a working model of the Solar System, with linearly-scaled orbital periods and logarithmically-scaled planet radii and orbital radii. We designed, built, and installed the orrery ourselves, with the permission and guidance of professors and structural engineers.

http://www.youtube.com/watch?v=aeZHO81Vz_o

Enjoy! Three days until graduation!

-Eitan

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 Post subject: Re: Andrews Hall Grand Orrery - CU Boulder
PostPosted: Mon May 07, 2012 7:52 pm 
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Very cool :D I really want to major in Mechanical Engineering when I go to college, great to see some of the projects actual engineering students work on :)

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PB: At home (In Competition)
2x2 1.xx (2.88)
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5x5 (3:00.02)
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 Post subject: Re: Andrews Hall Grand Orrery - CU Boulder
PostPosted: Mon May 07, 2012 7:56 pm 
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Joined: Thu Dec 31, 2009 8:54 pm
Location: Bay Area, California
pirsquared wrote:
On May 6, 2012, we unveiled the Andrews Hall Grand Orrery. It is a working model of the Solar System, with linearly-scaled orbital periods and logarithmically-scaled planet radii and orbital radii. We designed, built, and installed the orrery ourselves, with the permission and guidance of professors and structural engineers
Hey Eitan, great choice of music for the event :D

What sort of precision does the Orrery have? How many "years" can it run before the position of some of the planets is off by more than 1% or so?

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 Post subject: Re: Andrews Hall Grand Orrery - CU Boulder
PostPosted: Mon May 07, 2012 8:26 pm 
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Location: Littleton CO
That’s really cool! What is the time scale? (e.g. 2 days per minute)


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 Post subject: Re: Andrews Hall Grand Orrery - CU Boulder
PostPosted: Tue May 08, 2012 6:21 am 
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Location: Eindhoven, The Netherlands
pirsquared wrote:
It is a working model of the Solar System


Very nice!
But.... it doesn't seem to work on solar power eh?

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 Post subject: Re: Andrews Hall Grand Orrery - CU Boulder
PostPosted: Tue May 08, 2012 9:32 am 
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Sounds nice. However I can't view YouTube at work. Could you post a few pictures?

Carl

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 Post subject: Re: Andrews Hall Grand Orrery - CU Boulder
PostPosted: Wed May 09, 2012 12:40 pm 
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Location: Evanston, IL
Thanks everyone!

The time scale is about 2088 to 1. This corresponds to Mercury orbiting the Sun once every hour, Earth orbiting every 4.5 hours, and Pluto going around every 43 days. In the video, it is going significantly faster than that, for the sake of demonstration at the unveiling. Mercury went around in about 16 seconds, and Pluto went around in 4.5 hours.

The length and radius scales are both logarithmic. This includes the sun, but it does not include the rings on Saturn, since they would have looked like a stubby belt if we had done them on the log scale.

Here's a link to a set of pictures:
http://www.flickr.com/photos/65033328@N ... 636166178/

-Eitan

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Buy a Radio Cube 3! Only $150 at Eitan's Shapeways Shop
Check out my video: Twisty Puzzles a la Vi



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