Apollo 11 astronaut Buzz Aldrin will appear Saturday on "TV on the WEB," a webcast produced by the Ampex Corporation. He is expected to discuss the current state of the space program, as well as his own experiences in the moon program. Aldrin also will discuss www.sharespace.org, a non-profit group he heads that aims to make space travel available to the public.

The interview and chat session will take place from 9 a.m. to 10 a.m. on July 31 at www.tvontheweb.com. Autographed collectibles will be for sale during the webcast.