Transit of Venus, Sun-Earth Day 2012

National Aeronautics and Space Administration

Goddard Space Flight Center

Transit of Venus, Sun-Earth Day 2012

Observing Certificate Program Parallax Activity

Parallax Method 3 - Distance using the Parallax Method

Enter all Contact times in Universal Time.


    Observer 1:
  1. Enter 1st contact:
  2. Enter 2nd contact:
  3. Enter 3rd contact:
  4. Enter 4th contact:
    Observer 2:
  1. Enter 1st contact:
  2. Enter 2nd contact:
  3. Enter 3rd contact:
  4. Enter 4th contact:
  1. Venus Angular Speed:
  1. Transit Chord Length:
  1. Bisector distance to center of sun:
  1. Observed Parallax Angle:
  1. Enter the "crow flies" distance between observers:
  2. km
  1. Observer Baseline Separation:
  1. Corrected Parallax Shift Angle:
  1. Distance to Venus:
  1. Estimated Astronomical Unit:

NASA Fact

A major solar 'superstorm' such as the one in 1859 could cost $30 billion a day to the US electrical power grid, and up to $70 billion to the satellite industry.