Curated OER
A Galaxy Up Close
In this Sombrero Galaxy worksheet, students observe infrared images taken by the Spitzer Infrared Telescope and the Hubble Space Telescope. They answer 9 questions about the details of the images such as the radius of the stellar...
California Institute of Technology
Spitzer Space Telescope: Finding Faint Galaxies
The brief text that accompanies the image at this site (titled Finding Faint Galaxies) describes details of the picture which features faint images of galaxies enhanced by infrared.