California Institute of Technology
Spitzer Science Center: Ring Beholds a Delicate Flower
The Ring Nebula, also known as Messier Object 57, is a dense, star-forming region captured in this space telescope image. In addition, a detailed textual overview explains various specifics of the picture.
ClassFlow
Class Flow: The Milky Way
[Free Registration/Login Required] This flipchart provides information about the Milky Way Galaxy and Charles Messier's famous nebulae catalog.