To make this point, this can be dramatically illustrated with views of astronomical bodies viewed through telescopes (some on space platforms) equipped with different multispectral sensing devices. Below are four views of the nearby Crab Nebula, which is now in a state of chaotic expansion after a supernova explosion first sighted in 1054 A.D. by Chinese astronomers (see Section 20 - Cosmology - for other examples).

• the upper left illustration shows the Nebula in the high energy x-ray region; 
• the upper right is a visual image; 
• the lower left was acquired from the infrared region;  
• the lower right is a long wavelength radio telescope image.
  
  

Quelle und Originaladresse  http://rst.gsfc.nasa.gov/Intro/Part2_3.html