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Messenger6/12/2023 ![]() ![]() During the fourth encounter, on March 17, 2011, a thruster maneuver inserted Messenger into a 200 × 15,193-km (124 × 9,420-mile) orbit with a period of 12 hours around Mercury. Flybys of Mercury happened on January 14 and October 6, 2008, and on September 29, 2009. Its first flybys were of Earth, on August 2, 2005, and of Venus, on October 24, 2006, and June 5, 2007. Messenger was launched on August 3, 2004, by a Delta II rocket from Cape Canaveral, Florida. View of Earth from the Messenger captured by the Mercury Dual Imaging System's wide-angle camera See all videos for this article SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!. ![]() Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today. ![]()
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