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These objects were discovered in the 18th century and were catalogued
so that eyeball observers using small telescopes would not confuse them
with comets. With the naked eye as a detector, most of these objects appear
as dim grayish blobs. They are considered a challenge to find for many
amateur astronomers. These objects are generally of large angular
size and hence larger than the typical field of view of many CCD
detector systems; hence CCD images of these objects are somewhat rare
compared to photographic ones. In this resource, we offer CCD images of many
of these objects, taken with a variety of different telescopes,
along with a description or narration of brief facts
about them.
Where appropriate we have linked additional images or diagrams
to further explain their properties or structure.
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The M31 Movie
(3.3 Meg mpeg) 
