Author name: astrored

Galaxies Click the icon to view galaxies of the Messier catalog >>Links; >>References; >>Galaxy Clusters The icon shows M51, the Whirlpool Galaxy. Spiral Spiral galaxies usually consist of two major components: A flat, large disk which often contains a lot of interstellar matter (visible sometimes as reddish emission nebulae, or as dark dust clouds) and …

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Messier Object Data as estimated by Don Machholz While a more or less homogeneous data collection of the Messier objects is hardly available from professional sources, amateur Don Machholz has estimated apparent visual magnitudes and apparent angular diameters of all Messier objects under about the same conditions, with a 6-inch reflector. It is remarkable that …

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