Bibliography

"The 10,000 Year Clock." The Long Now Foundation. 2005. Accessed October 26, 2018. http://longnow.org/clock/orrery/.

Williams, Matt. "What Is an Orrery?" December 13, 2016. Accessed October 26, 2018. https://www.universetoday.com/44671/what-is-an-orrery/.

Middlebury College Special Collections. “Middlebury College Course Catalog 1818” 1818.   Accessed October 26, 2018.                        https://omeka.middlebury.edu/invention_of_nature/admin/items/show/33