“If you are able to observe all 110 objects during one single night – from dusk to dawn – you have completed a Messier Marathon.” This is the main definition of a Messier Marathon. There can be different versions of a Messier Marathon: The old style completely analogue Messier Marathon: Using just telescope, eyepiece and printed sky maps. A visual Messier Marathon using setting circles and perhaps goto to center the objects An Electronic Assisted Astronomy (EAA) Messier Marathon where the objects are observed with a camera I know there are opinions about what is the right way to do it but for me the most important is that you do it and enjoy it:-) The Messier Catalog There are 110 objects in the Messier Catalog – 40 [...]
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