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2. Mystery Case Files: Return to Ravenhearst Walkthrough Part 3

   www.aol.com/news/2013-02-12-mystery-case-files...

   Click on the handle of the well 3 times and the bucket will rise to the top. Pick up the rusty knife that is inside. Go back to the schoolhouse/ toy store area.

3. RC Optical Systems - Wikipedia

   en.wikipedia.org/wiki/RC_Optical_Systems

   The smallest RCOS telescope, the 12.5 inch F/9 Ritchey-Chrétien had a base price of just over twenty thousand US dollars in 2009, with large and/or custom models costing considerably more. RC Optical Systems and Star Instruments won a lawsuit in 2008 against Meade Instruments over Meade's description of RCX400 and LX200R telescopes and the ...

4. Hartmann mask - Wikipedia

   en.wikipedia.org/wiki/Hartmann_mask

   Hartmann screen used for the 200-inch (5.1 m) Hale Telescope Using a Hartmann mask to adjust focus Hartmann mask is a tool to help focusing telescopes , mainly used by amateur astronomers. It is named after the German astronomer Johannes Franz Hartmann (1865–1936), who developed it around 1900.

5. List of telescope parts and construction - Wikipedia

   en.wikipedia.org/wiki/List_of_telescope_parts...

   Star Diagonal: Used to change the angle of the light coming out of a telescope, for easier viewing. Herschel Wedge: Similar to a star diagonal with a wedge-shaped unsilvered prism reflector that reduces incoming light by up to 95% for solar viewing. Coma corrector a correcting lens used to reduce coma distortion in fast reflecting telescopes.

6. I tried Home Depot’s viral Halloween decor, and my yard has ...

   www.aol.com/lifestyle/home-depot-halloween-decor...

   Ever since the launch of its viral 12-foot skeleton in 2020, Home Depot has released new larger-than-life Halloween decor every year, and every season has new, innovative decorations that are ...

7. Great refractor - Wikipedia

   en.wikipedia.org/wiki/Great_refractor

   The telescope was placed by the astronomer James William Grant, and it had an 11-inch aperture (280mm) and a 16 feet (4.88m) focal length. [16] [17] At the 1861 International Exhibit, the size increased to showing a telescope with 21-inch objective lens. [18] The Buckingham or Walworth Common telescope's objective was manufactured by William ...

8. ARO 12m Radio Telescope - Wikipedia

   en.wikipedia.org/wiki/ARO_12m_Radio_Telescope

   At that time, it was 36 feet (11 meters) in diameter and was known as the 36-foot Telescope. In 1984, it was renovated with a new backup structure and a slightly larger dish. At this point its name was changed to the 12 Meter Telescope. In 2000, the NRAO passed control of the telescope to the University of Arizona.

9. Theodolite - Wikipedia

   en.wikipedia.org/wiki/Theodolite

   A direct-readout theodolite, manufactured in the Soviet Union in 1958 and used for topographic surveying. A theodolite (/ θ i ˈ ɒ d ə ˌ l aɪ t /) [1] is a precision optical instrument for measuring angles between designated visible points in the horizontal and vertical planes.