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Transit of Venus, 2004

Transit of Venus, 2004. David E. Fields. What is the transit of Venus?. A transit of Venus occurs when Venus crosses the sun, as seen from earth. Only six such events have occurred since the invention of the telescope (1631,1639, 1761,1769, 1874 and 1882)

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Transit of Venus, 2004

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  1. Transit of Venus, 2004 David E. Fields

  2. What is the transit of Venus? • A transit of Venus occurs when Venus crosses the sun, as seen from earth. • Only six such events have occurred since the invention of the telescope (1631,1639, 1761,1769, 1874 and 1882) • We will observe the transit of Venus from TAO on June 8, 2004

  3. Jeremiah Horrocks Watching the Transit of Venus in 1631

  4. Afbeelding van den weg der planeet VenusNicholas Ypey, 1761.

  5. Report by B. Franklin in 1769

  6. Reanimating the 1882 Transit of Venus • In late 1882, Massachusetts astronomer David Peck Todd traveled to California to photograph the transit of Venus from the summit of Mount Hamilton, where a solar photographic telescope waited among the stacks of bricks and timbers from which Lick Observatory was rising. • As the transit unfolded on December 6th, Todd obtained a superb series of plates under perfect skies. His 147 glass negatives were carefully stored in the mountain vault, but as astronomers turned to other techniques for determining the scale of the solar system.

  7. Local Sunrise, Phases 3 and 4 Sunrise (UT) Egress Alt Egress Alt h m h m s ° h m s ° 10:17 11:06:08 8 11:26:10 12

  8. TAO Visibility – we have trees.

  9. Global visibility and cloudiness

  10. Percent Frequency of Cloud Cover at mid-transit (08h UT) Average Weather Statistics for June North America Location ClearScatteredBroken Overcast Boston, MA19.222.818.539.5 Washington, DC23.322.0 21.033.6 Atlanta, GA33.922.116.927.0 Miami, FL16.949.920.812.4 New Orleans, LA37.736.416.19.8 Nashville, TN36.324.116.722.9

  11. Visit TAO Saturday afternoon, June 5 at 1500h (3:00 PM) for work party And Tuesday morning June 8 at 0630 h (6:30 AM)

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