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Vestal Street Observatory 
3 Vestal St.
Nantucket, MA 02554
508-228-9273
http://www.mariamitchell.org/visit/vestal-street-observatory
Observatory: Science, Walk
Built in 1908, this newly-restored dome has been the site of research, lectures, and other programs for over a century. View an outdoor scale model of the solar system, learn how to operate a sundial, and maybe observe some sunspots. Learn more about modern astronomy touring a permanent indoor exhibit.