Crab Nebula
Also known as Messier 1 (M1), the Crab Nebula is a supernova remnant resulting from a stellar explosion observed in 1054 CE. Located approximately 6,500 light-years away in the constellation Taurus, it spans about 10 light-years and is expanding at roughly 1,500 kilometers per second.
Source: apod.nasa.gov
APODs including "Crab Nebula"
Messier Marathon
18/03/1999
Gripped by an astronomical spring fever, this week many amateur stargazers embark on a Messier Marathon. The Vernal Equinox occurs Saturday, March 20, marking the first day of Spring for the Northern Hemisphere. It also marks a favorable celestial situation for potentially viewing all the objects in 18th century French astronomer Charles Messier's catalog in one glorious dusk to dawn observing run. This year, interference from bright moonlight will be minimal as the the moon is near its dark or new phase. Astronomer Paul Gitto has created this masterful Messier Marathon grid with 11 rows and 10 columns of Messier catalog objects. In numerical order, the grid begins with M1, the Crab Nebula, at upper left and ends with M110, a small elliptical galaxy in Andromeda (lower right). Gitto's images were made with a digital camera and a 10-inch diameter reflecting telescope.