Original sentence: Morehead Planetarium opened in 1949 after seventeen months of construction.The facility was donated to the university by alumnus John Motley Morehead III
Edited sentence: Astronauts enjoyed soft drinks, cookies and other snacks during their intense hours long training session leading planetarium employees to create the code name "cookie time" to refer to the training sessions.From 1959 through 1975 every astronaut in the Mercury, Gemini, Apollo, Skylab, and Apollo-Soyuz Test Project program astronauts spent hours in celestial navigation training at the planetarium.It is one of the oldest and largest planetariums in the United States having welcomed over 7 million visitors by it's 60th anniversary in 2009.Morehead Planetarium opened on May 10, 1949 after seventeen months of construction.Morehead technicians developed simplified replicas of flight modules and tools for use in the training, often from plywood or cardboard.Occasionally word did leak out and noted clothing designer and Chapel Hill native Alexander Julian recalls meeting Mercury Astronauts during a visit to the planetarium while in junior high.Several of these items are on display at the planeterium.That training helped saved astronauts lives during several missions.The Planetarium and Science Center receives 2/3 of its funding through ticket sales and 1/3 through state funding.The facility was donated to the university by alumnus John Motley Morehead III who invested over $3 million in the facility