It is understood that Professor Bond of Cambridge F.S.A, is preparing for publication a lengthy memoir in 1863 on this magnificent object, embodying the results of 14 years observations, latterly made with Alvan Clark’s large object glass of 18.5-inch aperture.
The spiral structure of the nebula which has lately been
distinctly visible in this glass and the supposed change of its appearance
within the last few years, will doubtless be found amongst the topics treated
off.
www.theramblingastronomer.co.uk
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