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sidewalk astronomy
Sidewalk or Street Corner Astronomy〔(Latimer J. Wilson, Adventures in Street Corner Astronomy, Popular Science Mar 1921 )〕〔(Frederick News Post - What's it like ... to be a street corner astronomer? Originally published October 16, 2008 - Herman Heyn, Bal street corner astronomer. )〕 refers to the activity of setting up a telescope in an urban setting on a for profit or non-profit basis as an entertainment and/or for public education.
==Overview==
Examples of people setting up telescopes on urban streets for public astronomical viewing go back well into the 19th century and maybe even further.〔(The Story of the Heavens - By Robert Stawell Ball – Herschel, after 1774 )〕〔(The Historical Society of Southern California quarterly by the Historical Society of Southern California, Pioneers of Los Angeles County v. 38 – 1956 “The "sidewalk astronomer" was conspicuous in Los Angeles. One such gentleman in the late 1870’s and early ‘80’s was Mr Grosser by name, who, for a small fee would allow the passerby to gaze not only through his sizeable telescope but also through the illumined microscope he carried” )〕〔(Theatrical management in the West and South for thirty years By Solomon Smith, Sinclair Hamilton Collection of American Illustrated Books before 1868 – mention for pay )〕〔(Journal of the Franklin Institute – 1880 – page 418 - Sidewalk Astronomers in Paris )〕 Sidewalk astronomers and their telescopes have been a common sight in most big cities.〔(Jerome Sydney Meyer, "Great inventions" - Page 51 )〕 There are many examples in the past such as Frank Manning in New Orleans as early as 1930 and Mr Grosser in Los Angeles in the 1870s, who not only set up a telescope but also an illuminated microscope. Some sidewalk "pitch men" charged the public to view astronomical objects through their telescope but other astronomers allow people to view for free.〔〔(Friends' intelligencer Page 298 1862 )〕 In more recent years sidewalk astronomy has come to be more associated with altruistic individuals or groups offering views of the nighttime sky as a free public educational service.〔"〕
Because the sidewalks tend to be in light-polluted areas, sidewalk astronomers often coordinate their activities at times when brighter celestial objects like planets, the moon, and bright stars are visible. During the day, sidewalk astronomy often includes use of a solar filter on the telescope to allow people to view the sun. Telescopes are often larger than the average available "department store telescope", sometimes very large.〔〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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