The Solar and Heliospheric Observatory (SOHO) is celebrating its 10th anniversary of operations on December 2nd, 2005. Over the course of these 10 years, SOHO has revealed the nature of the Sun's atmosphere, the links between its magnetic fields and coronal mass ejections, and even discovered more than 1,000 comets. Scientists even figured out how to use SOHO to probe the far side of the Sun.