Jump to content


Why not a cylindrical observatory?

  • Please log in to reply
76 replies to this topic

#76 rimcrazy


    Ranger 4

  • -----
  • Posts: 302
  • Joined: 03 Mar 2012
  • Loc: Overgaard, AZ

Posted 10 February 2013 - 08:05 AM

Here in Arizona two of the most historically famous observatories are cylinders.

The Clark dome houses the Clark refactor that Percival Lowell used in founding the Lowell Observatory.

Posted Image

And Clyde Tombaugh used the telescope in this building to discover Pluto.

Posted Image

I would say that there are a few pretty famous cylindrical observatories around.

#77 Kaizu



  • -----
  • Posts: 472
  • Joined: 17 Aug 2007
  • Loc: Finland

Posted 10 February 2013 - 09:48 AM

I like your second link...

Here is a simple solution for the track... Using an octagon of 2X12 or similar pieces, you can inscribe a circular track.... Instead of trying to make a perfectly circular piece.

I would use two courses rotated a bit so that their seams are not inline - to give additional strength.. Then put rollers on the bottom of the octagon shaped "cylinder" to rotate it...

I built mine almost as by your sketch. Click the first image and you see how I built it. The "dome" is made of aluminium sheets which are fixed and sealed on a wooden sceleton. The Cityobservatory has resisted wind, rain and snow few yeas. Inside there is a 10" TAL250K or a 10" Newton astrograph.


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics