Fifty years ago two men made history by being the first astronauts to set foot on the surface of the moon.
Neil Armstrong and Buzz Aldrin made "a great leap for man kind" on July 20, 1969 by being the first men to complete a moon walk.
The Macarthur Astronomical Society, in collaboration with One Giant Leap Australia, will host an event to celebrate the anniversary of this world first on Sunday, July 21.
Apollo 11 to STEM and The Next Giant Leap will feature seven NASA and Jet Propulsion Laboratory scientists, a screening of iconic Australian film The Dish and STEM talks with mission scientists.
The event will be held at Campbelltown's Western Sydney University campus, building 30, from 9am to 4.30pm.
Registration is at 8am.
Tickets are $20 for adults, $10 for children or $40 for a family ticket (two adults, two children).
To book, visit www.trybooking.com/BCBQU.