• The von Rheticus Model Telescope
  
  
  
  • Terrestrial instrument - wide field of view, right side up 
  
  
  • Two buttons - one larger, one smaller
  
  
  • Pressing either button shows current magnification as a red number
  
  
  • Magnifying power ranges from 10 to 250
  
  
  • Knob on the left side changes focus
  
  
  • 15 cm in length
  
  
  • Objective lens is 2.5 cms
  
  
  • Resolution of 1 archsecond
  
  
  • Cap fits over the objective lens
  
  
  • String connecting cap to the tube via Sticking Charm
  
  
  
  

• Telescope's resolution is the smallest angular distance between two points of light, as observed by the naked eye


• Two charms can protect the objective lens
  
  
  
  • Scratch-Resistant Charm
  
  
  • Break-Resistant Charm
  
  
  
  


• Do not look at the Full Moon or Sun or the power will strip your telescope of its charms


• Must use a sun filter if looking at the sun with any telescope to prevent going blind


• Keep the cap on your telescope whenever it is not in use


• The Lunascope and the Moon Chart
  
  
  
  • Lunascope looks like a telescope
  
  
  • Punch the day, month, and year into the three buttons on the side
  
  
  • Look through the hole, it will show you the moon phase for the day you chose
  
  
  • Moon chart is a piece of parchment that shows ten consecutive dates side by side
  
  
  • Touch the right side to move forward ten days
  
  
  • Touch the left side to move backward ten days
  
  
  
  


• The Celestial Globe
  
  
  
  • Shows the stars and constellations on a globe
  
  
  • Non-magic version doesn't show Moon, Sun, or planets
  
  
  • Magic version does show the Sun, Moon, and Planets
  
  
  
  


• Other Astronomical Tools
  
  
  
  • Orrey: model of the solar system
    
    
    
    • Magic version has the sun and planets floating around
    
    
    • Mainly used for educational purposes
    
    
    
    
  
  
  • Star chart: flat map of the sky which helps you locate stars and constellations
  
  
  • Astronomer's lamp: Emits a red light that allows you to see where you are going without reducing your night vision
  
  
  
  


• Viewing tips
  
  
  
  • Do not try to locate an object with your telescope at high power
  
  
  • Looking away from the centre of the viewing field allows you to see stars that are slightly too dim to see straight on
  
  
  • Stars twinkle, planets do not
  
  
  • Largest angular sized star is Betelgeuse (0.044 arcseconds)
  
  
  • Smallest angular sized planet is Neptune (2.2 arcseconds)
  
  
  
  

Picture below shows apparent angular size of various parts of your hand. These are estimates and vary person to person.