Astronomer Dave Fong will lead the planetarium show “Cosmic Colors” on Saturday, Aug. 11 at the Edwin E. Ritchie Observatory at Battle Point Park.

If the sky is clear, astronomers will be on hand with telescopes for public star gazing afterward.

BPAstroKids will meet from 4 to 6 p.m. Aug. 11 to fold awesome airplanes and decorate them with LED lights. Organizers say these will be a ton of fun to fly off the roof, and to fly at night at home.

Admission to “Cosmic Colors” is free to members of the Battle Point Astronomical Association; a $2 donation is suggested for nonmembers, $5 for families.

The BPAA is a nonprofit amateur astronomy organization that operates the Ritchie Observatory and John H. Rudolph Planetarium in the Helix House at Battle Point Park.

For more information, visit www.bpastro.org.