Venus Transit prospects for AFA Goa


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Venus Transit prospects for AFA Goa

  1. 1. VENUS TRANSIT of 2012 Association of Friends of Astronomy - Goa“This by far the noblest astronomyaffords...”-Edmund Halley
  2. 2. What is it?A transit of Venus occurs when Venus passes directly between the Sun and the Earth.
  3. 3. How often does it occur? This alignment is rare, coming in pairs that are eight years apart but separated by over a century. The most recent transit of Venus was a thrilling sight in 2004. After the June 2012 transit of Venus . The next such alignment occurs in 2117.
  4. 4. What is its scientific importance?One can emulate Sir Edmund Halley and verify one of the most importantcelestial constants, the AU.The AU or the Astronomical Unit as it is known, is the average distancebetween the Earth and the Sun.This can be done using basic trigonometry and geometry. From different locations on earth, the exact contact times vary by minutesor seconds. That slight difference in times is the essence of a transits value,for it allowed astronomers to calculate the size of the solar system. The entire event takes about 6 hours 40 minutes For the methodology, please refer this link.
  5. 5. Visibility of VT.The following map by Fred Espenak, a celebrated eclipse charter from NASA shows the global visibility of the forthcoming Venus transit.
  6. 6. VT Prospects for Goa.
  7. 7. VT prospects for Goa•As one can observe, the whole transit is not to be seen fromGoa. Hence, the scope of concrete scientific study of the rarecelestial phenomenon decreases considerably.•Also, the incoming monsoons are more than expected to spoilone of nature’s most stunning display making viewing theevent nearly impossible for the Goan population.
  8. 8. Hunting for places to see the VTAfter a lot of considerations for potentially good spots for observation of the Venus Transit, we came to a conclusion that Hong Kong would be a viable alternative for reasons more than one.
  9. 9. VT prospects for Hong Kong.•As one can see, Hong Kong lies in the zone wherein the wholeof the Venus transit will be visible.•As the Venus Transit is a day-time phenomenon, even a citywould do for observation. Hence, Hong Kong fits into thecriteria of the city which was lying in the zone and relativelycheaper to travel to.•The weather conditions in Hong Kong are much moreconductive to observations than the Goan conditions.
  10. 10. THANK YOU.For more details about the transit, do visit this link.