By Stoyan R., Binnewies S., Friedrich S.
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Extra info for Atlas of the Messier Objects: Highlights of the Deep Sky (2008)(en)(370s)
M 91 With this galaxy, a positional error is also the most likely explanation. There is no sufﬁciently bright galaxy at the position given by Messier, only a lot of faint galaxies of the Virgo Cluster. 7° south of Messier’s position. C. Williams showed that Messier used a galaxy as his reference point for M 91 (there are hardly any bright stars in this ﬁeld) and that he sim- Bode’s catalog of nebulae In 1777, three years after Messier presented his ﬁrst catalog, the Berlin astronomer Johann Elert Bode undertook the same endeavor.
8m) mirror. Then the largest telescope in the world, it was set up in the gardens of his Irish estate at Birr castle and was so cumbersome that several people were required to operate it. Nevertheless, the Lord himself and several assistants made a large number of observations and drawings of nebulae in the decades to follow. One of his most important discoveries was the spiral structure of some galaxies. However, this success later tricked him into seeing spiral patterns even in star clusters.
Lacaille’s catalog of 42 objects was published in 1755 in the Memoirs of the French Academy of Sciences, and again in 1784 as an annex to Messier’s work. 1 min Ast = asterism. 0. 32 1' (52") The frontispiece of Lacaille’s catalog depicts a contemporary view of the Paris Observatory. ” Incidentally, each of the sections contains exactly 14 objects. This equipartition already puzzled Kenneth Glyn Jones in the 1960s. Perhaps it satisﬁed a baroque desire for symmetry. Lacaille himself remarked on his list as follows: “I have found a large number of nebulae of these three types in the southern sky, but I would not believe that I have noticed all of them; in particular of the ﬁrst and third type, because these are visible only after dusk and in the absence of the Moon.
Atlas of the Messier Objects: Highlights of the Deep Sky (2008)(en)(370s) by Stoyan R., Binnewies S., Friedrich S.