On rare occasions, Venus passes between the Earth and the Sun. During the twenty-first century, it will happen twice, once in the year 2004, and once in the year 2012. Such events are called Venus Transits.
Above: Mike Garrahan and Chris Sarnecki (with the glasses) demonstrate two methods of observing the sun: Projecting the image onto paper or using glasses with specially designed filters are safe methods of observing the sun, other methods can lead to permanent eye damage.
The following are links to pages with photographs from the 2004 Venus Transit (which occurred on June 8, 2004). All were taken from Southeast Michigan (most from Ann Arbor).
The following are other pages related to the Transit.