What do dragonflies and telescopes have in common? Join astronomer Steve Ruhl for “On Dragonflies and Seeing Dark” as he looks at a new class of telescopes and the new classes of objects it is finding.

The show is 7:30 p.m. Saturday, Jan. 13 at the Edwin E. Ritchie Observatory.

The show is free to members of the Battle Point Astronomical Association; $2 donation suggested for nonmembers, $5 for families.

BPAstro Kids will be spinning with Dr. Erica in “Spin” at 4 to 6 p.m. as she looks at how things spin.

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

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.