Gravitational waves and a groundbreaking observation that has opened a window to the new world of “multi-messenger astronomy” will be the topic of the next Science Café at 7 p.m., Sunday, July 16, at Gella’s Diner, 117 E. 11th St., Hays.

“Relativity, Gravitational Waves and Laser Interferometer Gravitational-Wave Observatory” will be presented by Amber Henry, a Fort Hays State University physics graduate who is the educational and outreach coordinator for the gravitational-ware observatory at the Hanford Observatory in Richland, Wash.

The event is sponsored by FHSU’s Science and Mathematics Education Institute.