Unless you are very lucky or half android, you might not see it. The next transits of Venus will be on December 10–11, 2117, and another one in December 2125.
Venus transits are historically of great scientific importance as they were used to gain the first realistic estimates and measure of the size of the Solar System. Observations of the 1639 transit, combined with the research of a parallax.
Parallax comes from the Greek (parallaxis), meaning “alteration”. Closer objects have a bigger parallax than more distant objects when observed from different points, perspective or position, The parallax can be used to determine the measure of distance.
The 2012 transit gave scientists a variation of exploration opportunities, particularly in the search for exoplanets.
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