A little ramble through 19th century astronomy - Messier 11

 Nature August 5^th 1875

The Great Cluster messier 11

As the first special publication of the Observatory of Hamburg, we have Prof. Helmert’s memoir detailing the results of his micrometrical observations of the components of this well-known cluster in the constellation of Aquila or in Clypeum or Scutum Sobieski, as many of the continental astronomers continue to call that part of the heavens which it is situate.

The memoir has a particular interest from the circumstance of Dr Lamont having similarly employed the Munich refractor in the years 1836-39.The investigation of any changes that may take place in the constituents of these groups of stars, as regards position or brightness, becomes a very attractive one, and as we know from the excellent work of Heer Pihl on the Perseus Cluster, it is not one always requiring the use of large instruments, such as have been employed in the hands of Lamont and Helmert, upon Messiewr 11.

D’Arrest terms this cluster ”magnifica innumerabilium stellarum coaservatio”; the amateur will remember Admiral Smyth’s comparison of the configuration of the components  to “ a flight of wild ducks”

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