Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. 73P/Schwassmann Wachmann, also known as Schwassmann Wachmann 3, is a periodic comet in our solar system which is in the process of disintegrating. Starting the 2011 perihelion passage the primary component 73P-C was recovered on 28 November 2010 near apparent magnitude 21.3. The primary component 73P-C will come to perihelion on 16 October 2011. Comet Schwassmann Wachmann 3, one of the comets discovered by astronomers by Arnold Schwassmann and Arno Arthur Wachmann, working at the Hamburg Observatory in Bergedorf, Germany, broke into fragments on its re-entry to the inner solar system, May 1, 2006, in a reaction triggered by the sun's heating the comet as it emerged from the frozen space of the outer solar system.