Ranger Probe Gallery
Images from the Ranger series
![*](https://webarchive.library.unt.edu/eot2008/20080923083057im_/http://heasarc.gsfc.nasa.gov/Images/heasarc/icons/orangeball.gif)
The spectrum of the diffuse gamma-ray background in the 0.001 - 100 MeV
energy range as measured by
OSO-3, Rangers 3 & 5, Apollo 15, and SAS 2.
The spectrum of the diffuse gamma-ray background in the 0.5 - 3.0 MeV
energy range as measured by Lunas 10 & 12, Cosmos 60, and
Ranger 3.