“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 is completely analogue Messier Marathon: Using just a telescope, eyepiece and printed sky maps. A visual Messier Marathon using setting circles and perhaps goto to centre 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 […]