Title: Transit of Venus Author: Craig Roberts & Matthew Cooper The scale of the solar system: A Project to Observe the Transit of Venus 6 June 2012.

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Title: Transit of Venus Author: Craig Roberts & Matthew Cooper The scale of the solar system: A Project to Observe the Transit of Venus 6 June 2012

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper The sighting of Australia by Captain Cook in 1770 was preceded by one of the most important scientific expeditions of the time; to measure the distance between the Earth and the Sun (an astronomical unit - AU) and so compute the scale of the solar system. This was achieved by measuring the time taken for Venus to transit across the face of the Sun from different locations on Earth and uses the parallax effect to compute 1 AU.

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper The Project will involve YOU! With Projects, Competitions And Seeing the Transit of Venus. But First something about the Transit.

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper (Courtesy Hyperphysics, 2006) Venus’ orbit is inclined (by 3.39 degrees) relative to the ecliptic

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper Date of transit Ascending (A) or Descending (D) node Duration since last transit (years and months) 6 December 1631A 4 December 1639A8 yrs 6 June 1761D121 yrs 6 months 3 June 1769D8 yrs 9 December 1874A105 yrs 6 months 6 December 1882A8 yrs 8 June 2004D121 yrs 6 months 5 June 2012D8 yrs 11 December 2117A105 yrs 6 months 8 December 2125A8 yrs

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper  First predicted by Johannes Kepler in the early 17th century  First scientifically observed transit in 1639 by Jeremiah Horrocks  using a telescope to project the image of the Sun onto a piece of paper  an estimation of the Astronomical Unit was made, but based on assumptions of the size of Venus  Early in the 18th century, Edmund Halley proposed a method of calculating the distance from Earth to Sun using transits of Mercury or Venus.  The transits of 1761 and 1769 were observed by many people, in different locations around the world.  The 1769 transit is the one observed notably by Captain James Cook in Tahiti.  In Australia in 1874, a team of men led by Government Astronomer Henry Chamberlain Russell, scientifically observed transit of Venus in various locations around New South Wales. The 1882 transit was not observed.  A re-enactment at Woodford in the Blue Mountains on 8 June 2004

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper  The Project will video of the event Which leaves a lasting record and allows accurate timing of the ingress and egress times The Project will video of the event  The Project partners with amateur astronomers using astronomical telescopes with an accurate tracking and timing mechanism Old New

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper If you live here … …. or here….

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper  Land Surveying,  Hydrographical Surveying,  Engineering Surveying  Mine Surveying,  Spatial Information, (Geographical Information)  Cartography,  Photogrammetry,  Remote Sensing and  Geodetic Surveying. Surveying & Spatial Professions cover:

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper  Astronomical Association of QLD Astronomical Association of QLD  Institution of Surveyors N.S.W. Institution of Surveyors N.S.W.  Institution of Surveyors QLD Institution of Surveyors QLD  Institution of Surveyors Vic Institution of Surveyors Vic  Australian Consulting Surveyors Vic Australian Consulting Surveyors Vic

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper  Surveying and Spatial Science Institute Land Surveying Commission  Surveying and Spatial Science Institute Qld Region  Bennett and Bennett, Brisbane Bennett and Bennett

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper

Title: Transit of Venus Author: Craig Roberts & Matthew Cooper THANK YOU