Mercury to hotfoot it across the face of the Sun - space - 03 November 2006 - New Scientist Space

A rare passage of Mercury in front of the Sun as seen from Earth will
take place on Wednesday, 8 November. The last time such a transit of
Mercury occurred was in 2003 and it will not reoccur until 2016.

Mercury will appear as a tiny black circle just 1/200th the width of
the Sun. It will take almost five hours for Mercury's orbital motion to
carry it completely across the Sun from Earth's point of view.

More at http://www.newscientistspace.com/article.ns?id=dn10436