Zwicky originally thought to be a young galaxy, actually seems to have formed around the same time as most other galaxies. The bluish-white knots in the heart of the galaxy are two major star-forming regions.
Photo: In this composite image of the Crab Nebula, matter and antimatter are propelled nearly to the speed of light by the Crab pulsar. The images came from NASA’s Chandra X-ray Observatory and the Hubble Space
Exploring Universe: Thomas Wright presents an alternate view of the Milky Way galaxy in cross section. Plates XXXI and XXXII show the universe filled with many systems like our own, each a star-filled shell surrounding its own "eye of Providence" - from A