Everyone has heard of the Hubble Telescope. At the planetarium show at 7:30 Saturday, April 9 at the Edwin E. Ritchie Observatory, astronomer Steve Ruhl will look at NASA’s other “Great Observatories” telescopes: The Spitzer, The Chandra and the Compton.

The BPAstro Kids shows at 5 and 6 p.m. with Dr. Erica will build telescopes.

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

The show is free to members of the Battle Point Astronomical Association; $2 donation 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, call 206-842-9152 or visit www.bpastro.org.