Navigation Facts
1200s Compass in use at sea in Europe
1457 George Purback issues first almanac
1519 Ferdinand Magellan begins circumnavigation
1500s Gerard Mercator brings map/chart making to an exact science
1570 Map of the World by Fernando Oliveira
1714 Act of Queen Anne establishes Board of Longitude
1766 First Nautical Almanac with Lunar Tables published
1802 The New American Practical Navigator by Nathaniel Bowditch is published
1878 Taffrail Log is developed
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of our Sky Guide!
Treworgy Planetarium
A Tribute to Our Brightest Star
Gazing skyward on a clear and starry night, there are few Mystic Seaport friends who would not immediately think of Don Treworgy. It is with great sorrow that we share the news of Don's passing on September 13, nearly one year after his diagnosis of terminal cancer. <Read more>
![]() | DAILY PROGRAMS and LOBBY EXHIBIT Learn about the Planetarium's daily programs and lobby exhibit that explores 19th-century navigation. Watch these Treworgy Planetarium videos: |
![]() | The Planetarium offers a variety of classes including coastal and celestial navigation and GPS workshops for adults, youth and scout groups. |
![]() | SPECIAL SCHOOL and GROUP PROGRAMS The Planetarium offers special programs for groups of all ages. |
![]() | THE NIGHT SKY and WEATHER Learn about the stars in Mystic's nighttime sky and the current weather forecast for southeastern Connecticut. |
![]() | Explore the sky throughout Connecticut and Rhode Island with these links. |
![]() | Learn about Cassini-Huygens, a spacecraft launched in 2004 to explore Saturn, with this link. |
![]() | Discover the history of navigation by reading a navigation timeline, or by looking at a historical survey of navigational instruments. |











