Education.com
Education.com: Different Types of Galaxies
[Free Registration/Login Required] A downloadable worksheet that looks at the features of three types of galaxies.
CK-12 Foundation
Ck 12: Earth Science: Galaxies
[Free Registration/Login may be required to access all resource tools.] Examines galaxies and how they are divided into three types according to shape.
NASA
Nasa: Antennae Galaxies
This image, titled "Fire Within the Antennae Galaxies" features three individual pictures of the antennae galaxies taken with different equipment (x-ray, infrared, etc). The text under the image details various specifics about the picture.