I became interested in astronomy 10 years-old when I saw Saturn through a telescope at my local astronomy society. As a youngster interested in astronomy, cash was in limited supply so as I grew older, my parents helped to subsidize an attempt at making my own telescope. It was a 15 centimeter Dobsonian Newtonian reflecting telescope.
The "Newtonian reflector" phrase describes the optical design of the instrument, while the term "Dobsonian" refers to the style of the mount. It was a beautifully simple style of mount that allowed even me as a young teenager a chance at making one myself out of wood.
John Dobson was born in China on Sept. 14, 1915, and his family moved to California in 1927. There he spent 23 years in a monastery even though as a teen he was a self-proclaimed 'belligerent atheist.' He achieved a Masters Degree in Chemistry in 1943 at the age of 28 and just a year later became a monk of the Ramakrishna Order.
His sideline interest in telescope building led him to communicate with others outside the monastery that were interested in his work and for this, he developed a code to attract less attention. Instead of referring to telescopes, he wrote about 'geraniums' instead; a 'potted geranium' was a telescope that was fitted to its rocker box (part of the Dobsonian mount) and a 'geranium in bloom' was a telescope that had an aluminumized mirror.
Dobson's telescope design soon became world renowned amongst amateur astronomers who continue to this day to build his telescope. The simplicity of the design makes them cheap to build so a popular choice among newcomers, but the design is scalable allowing the design to work well for large instruments. In fact, among amateur telescopes, I don't think I have seen many telescopes over 35 centimeters aperture that are not of the Dobsonian design.
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