Martin Hamar, an astronomy expert who invented the first laser alignment system nearly 50 years ago, will give a talk on the upcoming solar eclipse on Tuesday, July 25, 3 p.m., at the Wilton Senior Center. The eclipse will take place on Aug. 21 and may be seen in locations across the country, but it will not be visible in the Northeast.

For those who plan to travel south — South Carolina is the nearest state in the path of totality — Hamar will discuss viewing safety tips and all the details on where and when the eclipse will take place.

The Great American Solar Eclipse is the first total solar eclipse visible in the United States since the 70’s. Fourteen states from Oregon to South Carolina will experience more than two minutes of darkness in the middle of the day when the moon completely blocks the sun.

The free preview event is presented by Stay at Home in Wilton. Refreshments will be provided. The senior center is in the Comstock Community Center at 180 School Road.  Reservations are highly recommended. Call 203-762-2600 or visit stayathomeinwilton.org

Hamar’s company, Hamar Laser, provides tools for very precise measurements. As a hobby, he took up a serious effort in astronomy, going so far as putting a remote telescope in Arizona that has much clearer atmosphere for viewing.