Robert Pappalardo, a visiting scientist from NASA’s Jet Propulsion Lab, will discuss “Ice and Oceans in the Outer Solar System,” in a 7:30 p.m. lecture April 14 in the Nebraska Union auditorium. The talk is free and open to the public.

The talk will include information about how Jupiter’s frozen moon Europa could be hiding an ocean of life.

Pappalardo is visiting three UNL departments — physics and astronomy, earth and atmospheric sciences, and biological sciences. He is a senior research scientist at the California Institute of Technology and an expert on Europa.

As part of the presentation, the UNL Student Observatory will be open from 8:30 to 10 p.m. April 14. The observatory is located on top of the Stadium Parking Garage on the corner of Stadium Drive and T Street.