Messier 100 (also known as NGC 4321) is an example of a grand design spiral galaxy located within the southern part of constellation Coma Berenices. It is one of the brightest galaxies in the Virgo cluster, approximately 55 million light-years distant from Earth and has a diameter of 160,000 light years. M100 is surrounded by some small faint galaxies, and the larger spiral galaxy NGC4312 is visible at the upper right. This is a 6.5 hour exposure taken on March 26-27, 2012. Click for a more detailed view.