In article . com,
oriel36 wrote:

Here is an image of Venus as it overtakes the slower orbitally moving
Earth with the central Sun in the background -

http://www.kwastronomy.com/images/Ve...sit-3-1-2c.jpg

The image above of Venus, in an inner orbital circuit,overtaking the
Earth is so rare that it will only happen once in a lifetime ,the
next time in 2012.

Venus overtakes the earth every 584 days. Presumably you are
referring to a transit of Venus, when it passes exactly between the
earth and the Sun. As you say, this will next happen in 2012, but it
it's hardly a once-in-a-lifetime event since the photo you link to was
taken in 2004. In fact, for most people it's either a
never-in-a-lifetime or a twice-in-a-lifetime event.

-- Richard
--
"Consideration shall be given to the need for as many as 32 characters
in some alphabets" - X3.4, 1963.