This cache is on the outskerts of Gunnedah on the Oxley Highway. It is a small cache container that can accomodate small coins/trackables. Parking available near the structure with the cache close by. Happy caching and good luck.
Experience...
Strap on your seatbelts and launch into Coonabarabran, The Astronomy Capital of Australia. Experience a scaled model of our Solar System that's 38 million times smaller than outer space!
See three-dimensional planet models along the way as you shuttle from Pluto at the furthest reaches of the Solar System to the Sun, which is represented by the 37-metre Anglo-Australian Telescope dome at Siding Spring Observatory.
The planets are displayed on huge billboards with the size of the planets and the distance between each billboard scaled relative to the dome – the Sun - along the five main roads that lead to Coonabarabran in regional NSW. You can also learn interesting facts about the Solar System and the unique features of each planet – did you know that it rains sulphuric acid on Venus?
Location...
Siding Spring Observatory is Australia’s largest optical astronomy research facility and is situated 28 kilometres west of Coonabarabran, in the spectacular Warrumbungle Ranges. 
Coonabarabran is approximately 5 ½ hours north-west of Sydney, in the picturesque region of Central NSWThere are 24 planets located at Visitor Information Centres and on roadsides between the observatory and the regional NSW towns of Dubbo, Tamworth, Gulgong, Moree and Merriwa to allow visitors to stop and experience all things astronomical (click here for map).
Neptune
Neptune is located at five sites:
- Gilgandra Cooee Heritage Centre, Newell Highway
- OL Milling Park, Bolaro Street/Golden Highway, Dunedoo
- Jorrock’s Park, Binnia Street, Coolah
- Rural Museum, Oxley Highway, Gunnedah
- Newell Highway, Pilliga Rest Area 2, south of Narrabri
In our model, Neptune is located up to 133 kilometres from the telescope dome (the Sun). In the real Solar System, Neptune is 4508 million kilometres from the Sun!
Neptune, named after the Roman god of the sea, was observed by Galileo in 1613 but mistakenly thought to be a star. It was the first planet to be discovered as the result of mathematical calculations. The planet Uranus was heading ‘off course’. Could it be the gravitational tug of another large planet? An English and a French astronomer calculated where that mysterious planet could be found – but nobody bothered to look! In 1846 a German astronomer did – and discovered Neptune. The fastest winds in the Solar System – at 2,250km per hour, are found on Neptune. Its largest moon, Triton, orbits the opposite direction to all other planets’ moons, and it rotates on its axis in the opposite direction to Neptune’s rotation. With a temperature of minus 233°C, Triton is also the coldest place in the Solar System. Neptune has a faint ring system.
