A transit is the apparent passage of a solar system body other than the Moon across the face of the Sun. The only visible transits are those of Mercury and Venus.
Description of the event, explanation of timing, illustrations including "black drop effect".
BBC News article anticipating the 2003 transit.
Brief description with diagrams of the 2004 and 2012 transits as seen from Guernsey.
Contains a number of pages dedicated to the 2012 Venus transit. Practical information regarding the location and observation methods and safety together with articles about past transits.
Webcam announcement from Worth Hill Observatory in the UK.
A table showing predicted time and path of the transit for various locations throughout the world. From the US Naval Observatory.
Describes the VT-2004 project that is related to this celestial event and which aims at transforming curiosity into knowledge and interest in science through a broad set of actions. It has been launched by the European Southern Observatory (ESO) and the European Association for Astronomy Education (EAAE), together with the Institut de Mécanique Céleste et de Calcul des Éphémérides (IMCCE) and the Observatoire de Paris in France, as well as the Astronomical Institute of the Academy of Sciences of the Czech Republic.
Windows software to calculate the exact dates and times at which transits between two selected planets (including the Sun) begin and end (relative to chosen orb values).
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