By SARA GIBONEY UNK Communications KEARNEY – The University of Nebraska at Kearney Planetarium is offering opportunities to learn about the upcoming total solar eclipse. At 12:57 p.m. Aug. 21, the city of Kearney will plunge into darkness for 1 minute and 54 seconds. In a rare celestial alignment between the sun, moon and earth, the moon will cast a shadow over a small patch of the earth’s surface. That shadow will traverse the entire width of the United States in 90 … [Read more...] about Planetarium shows feature glimpse into Aug. 21 solar eclipse