Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
Get a Cloudy Nights T-Shirt Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu uh, User

Announcements and News >> Discussion of CN Articles, Reviews, and Reports

Pages: 1
Olivier Biot

Reged: 04/25/05

Loc: 51°N (Belgium)
The Botswana Solstice Machine
      #5074934 - 02/16/12 06:15 AM

The Botswana Solstice Machine

By Carl Dori.

Post Extras: Print Post   Remind Me!   Notify Moderator  

Reged: 11/01/06

Loc: New York
Re: The Botswana Solstice Machine new [Re: Olivier Biot]
      #5075612 - 02/16/12 02:21 PM

There is a similar, albeit much larger structure in northern Chile, outside of Antofagasta. It however lacks the neat shadow tube, but rather has the form of an open gate, with a round plaque inscribed with the tropic line in the floor.
Presumably the shadow of the top of the gate will fall on the tropic line on Dec 21.

Post Extras: Print Post   Remind Me!   Notify Moderator  
scholastic sledgehammer

Reged: 04/11/10

Loc: "lamorinda", CA
Re: The Botswana Solstice Machine new [Re: Olivier Biot]
      #5077085 - 02/17/12 01:28 PM

What an amazing find.

I hope someone is able to tell us something about the person or group that placed it.

Sadly here in a first world nation, such a monument would have be vandalized; defaced first and then any brass or bronze stolen.

Post Extras: Print Post   Remind Me!   Notify Moderator  

Reged: 08/16/10

Loc: Blue Ridge Mtns. of Virginia.
Re: The Botswana Solstice Machine new [Re: barbarosa]
      #5077775 - 02/17/12 10:20 PM

As a land surveyor by day and astro-nut by night I found this article very interesting and the photos are good too. I would like to know more about it too, particularly how it was determined where to place it so as to be on the correct latitude. Nowadays with GPS so common that housewives use it to find grocery stores, latitude and longitude are taken for granted by many, but there determination is a real bit of a measuring trick without GPS. Latitude is not as difficult to get roughly but I would think since this monument seems to work so well more sophitiscated astronomical observations were used, rather than the simplest "drive a stick in the ground" method. Longitude is a different matter and I would encourage anyone interested in such matters and the history of how these determinations, so important in navigation, were developed to read the short but very good book "Longitude" by Dava Sobel.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1

Extra information
0 registered and 11 anonymous users are browsing this forum.

Moderator:  droid 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled

Thread views: 1571

Jump to

CN Forums Home

Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics