A partial lunar eclipse overnight on Thursday will be the longest one in more than 500 years, according to astronomers. The event’s total duration is expected to last 3 hours and 28 minutes, the longest in about 580 years, confirmed the Holcomb Observatory in Indianapolis and other astronomers this week. The “nearly total” lunar eclipse is expected to take place overnight Thursday, Nov. 18, to Friday, Nov. 19, said NASA. “The Moon will be so close to opposite the Sun on Nov. 19 that it will pass through the southern part of the shadow of the Earth for a nearly total lunar eclipse,” the space agency says on its website. A partial lunar eclipse takes place when a full moon is partially obscured by Earth’s shadow. About 97 percent of the moon will be covered during the eclipse, says NASA’s website. “Partial lunar eclipses might not be quite as spectacular as total lunar …