It is known as "The Dish" and it soars above a nondescript paddock in rural Australia. Without it, hundreds of millions of people would never have seen all of the generation-defining footage of Neil Armstrong walking on the moon 50 years ago.
An estimated 600 million people around the world held their collective breath as they watched their television screens on July 20, 1969, waiting to see Armstrong step out from the Apollo 11 lunar module and into the history books.
Back on Earth, it started out as just another day at work for David Cooke, the senior receiver engineer on the radio telescope at the Parkes Observatory in southeast New South Wales state, about 360 km (225 miles) west of Sydney.