The Gravity Discovery Centre and Observatory is a "hands-on" science education, astronomy, Aboriginal culture and tourist centre, situated on the site of the Gravity Precinct in bushland near Gingin, north of Perth, Western Australia. It is a not-for-profit interactive science education centre, operated by The Gravity Discovery Centre Foundation Board Inc. It received government funding of $300,000 to cover the period 2021-2023. The Department of Biodiversity Conservation and Attractions manages the bushland surrounding the Discovery Centre and the observatory. In 2005, Emeritus Professor John de Laeter was awarded the Eureka Prize for "promoting [the] understanding of science" in recognition of his creation of the Gravity Discovery Centre. Exhibits The Discovery Centre Magnetic Cart Visitors can roll this cart, which has strong magnets attached to it, down a ramp. They are invited to notice how it slows down as it passes over the metal plates, which are made of copper or aluminium: both good electrical conductors. The moving magnet creates electricity in the metal plates – the kinetic energy of the cart is converted to electrical energy, slowing it down. OzGrav Model OzGrav is the abbreviation for the ARC Centre of Excellence for Gravitational Wave Discovery. Bernoulli Ball Bernoulli's principle explains that an increase in the speed of air produces a decrease in static pressure. The principle is named after Daniel Bernoulli who published it in his book Hydrodynamica in 1738. In this interactive display, when the ball moves to the side it is pushed back toward the centre of the air flow. The upward flow of air provides an upward force on the ball keeping it suspended – apparently defying gravity. Space Capsule This spinning display demonstrates gravitational forces. The Cosmology Gallery This gallery is topped with a diameter geodesic dome NIOBE, the first southern hemisphere gravitational wave detector. The search for gravitational waves began in the 1990s and this detector, called NIOBE, was one of five set up around the world as part of that search. At its heart is a niobium bar. This niobium bar gravitational wave detector, and associated superconducting electromechanical sensors, were developed by Professor David Blair of UWA. It came into operation in 1993 after 16 years, 12 PhD projects and several million dollars to build. This worldwide experiment set limits to the strength of gravitational waves and paved the way for the next generation of detectors. They achieved world-record sensitivity and opened a new