To celebrate the 40th anniversary of the first manned lunar landing, Denison University in Granville will open the Swasey observatory for lunar viewings, starting at 8:30 p.m. Tuesday, July 28.

To celebrate the 40th anniversary of the first manned lunar landing, Denison University in Granville will open the Swasey observatory for lunar viewings, starting at 8:30 p.m. Tuesday, July 28.

"If it's clear, we'll be looking through the 9-inch telescope, and there will be ground-level viewing as well," said Sandy Yorka, professor emeritus.

The Swasey observatory was built in 1909 and contains one "9-inch (diameter) refracting and two 8-inch refracting telescopes," according to information from Denison's Web site. Yorka said the telescope is about 15 feet long.

"We can see the Andromeda Galaxy quite well, which is 2-million light years away," Yorka said.

Starting at 8:30 p.m., visitors will be able to see the first quarter of the moon. When the view becomes blocked by trees an hour later, visitors will begin viewing other objects, such as the Ring Nebula, starting at 9:30 p.m., Yorka said.

Yorka will be on hand to answer questions, along with assistant professor Dan Homan and 2000 Denison graduate David Green, who worked with The Boeing Co.

"I think it's cool that people will have access to the experts, who will be there to answer questions and show them (visitors) how to use the equipment," said Barbara Stambaugh, Denison's media-relations coordinator.

Yorka said Green graduated with a physics degree from Denison and taught in the U.S. Navy prior to working for Boeing. She said he is a good resource for young people or students interested in talking about career opportunities.

Even if it rains, Yorka said, the three of them still will attend in case anyone wants to talk or ask questions.

She said the observatory is open for public events whenever staffing allows. The building is small and does not provide enough space for lectures, but it is used by astronomy students.

For more information about the event, call (614) 205-5654.