Today, we will have the opportunity to experience something that
truly deserves the over-used phrase "once in a lifetime." Venus will be
passing directly between Earth and the sun and will be visible with the
correct equipment. The next time this particular phenomenon will occur
will be in 2117 - 105 years in the future. Even with all the
advancements in modern medicine, it's unlikely that anyone will be
around long enough to see this event twice.