I should get one of these mounted to the dash of my car. All I'll need to do is design and build a self-leveling, North-tracking mount. Then add some servos to adjust my latitude and longitude and time. I can drive all that with a Raspberry Pi fitted with a GPS unit. A couple of thousand lines of python later and I'll never need to worry about being caught out in one of those pesky eclipses again. Thanks Bob.
Enjoyed this video. The the camera focus was sharp and your explanation of the set up was very clear. Could you add specific information about this kit in the description (for those who would like to build it)?
Fascinating tool! I'm always amazed at the ingenuity of the minds that invented devices like this. It ties into a little something I'm working on for my next video. I started it a few weeks back when Corey Kell was all the rage but never finished it. It's all about the "sun path diagram", a chart that traces the path of the Sun across the sky, a chart that is used by people setting up photovoltaic systems.
Now that was interesting. I had no idea how they worked, but your demonstration at the end gave me a lightbulb moment and I grasped the basic concepts of how to use it. Nice.
Thank you for your video regarding the Armillary Sphere. My Equinoctial Sundial is similarly shaped and can read the hour of the day from a beam of sunlight through its gnomon.
Very interesting ! About the moon nodes, you did set them for may 18th, but I suppose you would have to adjust their position differently for any other date ? And re-align the phases ring with the sun. Is that conveniently done on this wooden model ?
Good night, Dr. Bob. I'm from Brazil, so I don't speak English very well. Do you have email? I would like to ask some questions about your video and experiment "Does Weight Change with Latitude?". I am studying and learning about the effects of gravity. You would be a great help on my journey. Thank you for your attention.
Thanks Bob, great videos! Very helpful; one question: it seems to me the longitude scale on the ecliptic ring is set backwards. Am I missing something?
@@sliderulesandmathematics9232 Because it is my understanding that the Ecliptic Longitude, just like the Right Ascension (RA) of the equator, should follow the "right hand rule". The error is in the kit´s design: the solstices have their degrees switched: the NH summer one (Cancer) should be at 90° ecliptical longitude, and the winter solstice (Capricorn) should be at 270° ecliptical longitude. I just assembled my own sphere, regardless of this issue, its still a beauty.
@@sliderulesandmathematics9232 Your assembly is surely fine (just like mine). Dreipunkt recently replied to my comment acknowledging this flaw in their design and already corrected it for their deluxe version. It´s an easy mistake since ecliptic longitude apparently is of little use for positional astronomy or celestial navigation. Whereas astrologers use the Zodiac signs and its 30 degrees (astrolabes don´t include it). Not even Stellarium has it in its axis options.
yes solar time, and no, you have to correct for longitude and equation of time just like with the astrolabe and sundial (unless a heliochronometer with correction)
I should get one of these mounted to the dash of my car. All I'll need to do is design and build a self-leveling, North-tracking mount. Then add some servos to adjust my latitude and longitude and time. I can drive all that with a Raspberry Pi fitted with a GPS unit. A couple of thousand lines of python later and I'll never need to worry about being caught out in one of those pesky eclipses again.
Thanks Bob.
Omg.. I love armillary spheres...I wish every school had them.
The design and engineering that went into designing these, it's a thing of beauty.
Enjoyed this video. The the camera focus was sharp and your explanation of the set up was very clear.
Could you add specific information about this kit in the description (for those who would like to build it)?
Fascinating tool! I'm always amazed at the ingenuity of the minds that invented devices like this.
It ties into a little something I'm working on for my next video. I started it a few weeks back when Corey Kell was all the rage but never finished it. It's all about the "sun path diagram", a chart that traces the path of the Sun across the sky, a chart that is used by people setting up photovoltaic systems.
Now that was interesting. I had no idea how they worked, but your demonstration at the end gave me a lightbulb moment and I grasped the basic concepts of how to use it. Nice.
more to come
Thank you for your video regarding the Armillary Sphere. My Equinoctial Sundial is similarly shaped and can read the hour of the day from a beam of sunlight through its gnomon.
Setting up the armillary sphere remembered me a bit of an equatorial telescope mount. Some commonalities (which is not surprising).
Doc, this is so great.
I like that there is lunar calculations for Solar eclipses, Great demonstration! Where can you get this model Please?
Well, I learned a lot, not the least being I'm not even sure what I learned but it was all good... Time to do some more learning....
Dr.Bob!! Love the content very interesting stuff.. Subbed and sharing
cool thanks!
Thank you for information
That is quite the computational device. And to think it was originally made centuries ago.
23 of them
Where can I find a kit like this. Thanks
Great,
Very interesting ! About the moon nodes, you did set them for may 18th, but I suppose you would have to adjust their position differently for any other date ? And re-align the phases ring with the sun. Is that conveniently done on this wooden model ?
yes
Good night, Dr. Bob. I'm from Brazil, so I don't speak English very well.
Do you have email? I would like to ask some questions about your video and experiment "Does Weight Change with Latitude?". I am studying and learning about the effects of gravity. You would be a great help on my journey.
Thank you for your attention.
Thanks Bob, great videos! Very helpful; one question: it seems to me the longitude scale on the ecliptic ring is set backwards. Am I missing something?
why do you say that?
@@sliderulesandmathematics9232 Because it is my understanding that the Ecliptic Longitude, just like the Right Ascension (RA) of the equator, should follow the "right hand rule". The error is in the kit´s design: the solstices have their degrees switched: the NH summer one (Cancer) should be at 90° ecliptical longitude, and the winter solstice (Capricorn) should be at 270° ecliptical longitude. I just assembled my own sphere, regardless of this issue, its still a beauty.
hmm wonder if I put it on backwards, I'll have to check.
@@sliderulesandmathematics9232 Your assembly is surely fine (just like mine). Dreipunkt recently replied to my comment acknowledging this flaw in their design and already corrected it for their deluxe version. It´s an easy mistake since ecliptic longitude apparently is of little use for positional astronomy or celestial navigation. Whereas astrologers use the Zodiac signs and its 30 degrees (astrolabes don´t include it). Not even Stellarium has it in its axis options.
How does it work for people in the Southern Hemisphere?
same way
When you say "time" of sunrise/moonrise/sunset etc, that is mean solar time? There's no correction for the equation of time, I assume.
yes solar time, and no, you have to correct for longitude and equation of time just like with the astrolabe and sundial (unless a heliochronometer with correction)
Where can One buy this.
Just do an Amazon search