This object lit up like a miniature sun several miles across and then shot off into space.While fishing at a pond north of Filley Nebraska we observed a strange light in the sky. This light was very high and far away to the northeast. Suddenly the light expanded to a very bright ball that must have been several miles across and looked like a miniature sun. This only lasted about 10 seconds. In the center of the light was the small lighted object which then headed east and up at a very high rate of speed and was gone from sight in 2-3 seconds.Three professional people observed this object. No drugs or alcohol were involved.