“Advanced Amateur and Observational Astronomy” begins May 22 at Richie Observatory at Battle Point Park.

Astronomer Dave Fong and Steve Ruhl, president of the Battle Point Astronomical Association, will look deeper into the universe. Topics include constellations and the celestial sphere, stellar and galaxy evolution, making vs. buying telescopes, astrophotography, image processing, computer programs and using computer-controlled telescopes like the 27.5-inch Ritchie.

If weather permits, there will be stargazing after class.

The four sessions are 7:30 to 9:30 p.m. Thursdays May 22 to June 12. Classes are open to the public (minimum age 14).

Sign up through the Bainbridge Island Metropolitan Park & Recreation District at www.biparks.org or 206-842-2306. The fee is $39 and includes all four sessions.