![]() As a result, the earliest sunrise occurs before the date of the summer solstice, and the latest sunset happens after the summer solstice. Around the date of summer solstice, these effects make the Sun appear to move slightly slower than expected when measured by a watch or clock. However, this day does have the least amount of daylight hours.īecause the path of the Earth around the Sun is an ellipse, not a circle, and because the Earth is off-centre on its axis, these combined phenomena can create up to several minutes difference between solar and mean time. Similarly, on the winter solstice, the sunrise is not the latest and the sunset is not the earliest. Sunrise, sunset and daylight hoursĪn interesting idiosyncrasy relating to the summer solstice is that it does not feature the day with the earliest sunrise and latest sunset as is commonly expected. The winter solstice is the day of the year that has the least daylight hours of any in the year and usually occurs on 22 June but can occur between 21 and 23 June. The summer solstice usually occurs on 22 December, but can occur between 21 and 23 December. It is the day that has the most daylight hours of any in the year. ![]() The summer solstice occurs once a year in December when the Sun's track across the Australian sky reaches its highest point. Geoscience Australia is the government's technical adviser on all aspects of geoscience, and custodian of the geographical and geological data and knowledge of the nation. The library provides services to geoscience organisations, universities, research centres, the mining and petroleum industries and the public. The National Mineral and Fossil Collection contains over 300,000 mineral, meteorite, fossil, and rock thin section specimens, with around 700 on permanent display in the foyer at Geoscience Australia. Client ServicesĪ wide range of spatial information products is available from the Geoscience Australia, from our retailer network or free from our website National Mineral and Fossil Collection Data Standardsĭata standards and symbols and reference databases. Movies and mobile apps produced by Geoscience Australia. List of links to Geoscience Australia's 3D models. Interactive Maps is a discovery and exploration view of Geoscience Australia's geospatial services. General and thematic maps of Australia including outline maps, bathymetric maps, geophysical maps and geological maps. Geoscience Australia provides web services for public use that allow access to our data without having to store datasets locally. Geoscience Australia maintains a number of online tools to promote the discovery and delivery of data. Search Geoscience Australia's extensive catalogue of data, publications, online tools, maps and videos. Geoscience Australia's digital publications. List of some of Geoscience Australia's most recent releases. Geoscience Australia provides information and advice towards the management of Australia's groundwater and surface water resources. Geoscience Australia is the national focal point for coordination of geodetic information and data, and maintains a national network of geodetic observatories which forms part of a global observatory network. Information regarding mineral and minerals exploration in Australia at national and regional scale, mining and land use, sustainable development of resources, and levels of exploration activity Positioning and Navigation Information regarding Australia's coasts and estuaries, seabed mapping and Antarctica. Our natural hazard capability forms part of the backbone behind the most important decisions made by governments, emergency services, and the industry sector. Location information about Australia's dimensions, landforms and national mapping. Petroleum resources, coal resources, uranium and thorium resources, geothermal energy, renewable energy resources, basin geology, Acreage Release. Geoscience Australia provides Earth observation services, expert advice, and information for decision makers. Information regarding various disciplines and techniques including: geochemistry, geochronology, geophysics and marine surveying. Our products include almanacs, software and web services providing precise astronomical data. Leaders in Earth science data, bringing the benefits of space to all Australians.
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