Our Astronomical Column

    Article metrics

    Abstract

    OBSERVATIONS OF NEBULAE AT THE HELWAN OBSERVATORY.—Mr. H. Knox Shaw describes in Bulletin No. 15 of the Helwan Observatory the observations made with the Reynolds reflector up to the end of September of last year, this paper being a continuation of that published in Bulletin No. 9. This work is described as being somewhat of a reconnaissance to see which nebulae would repay photographing with long exposures when the new Ritchey 30-in. mirror is mounted. The paper gives a list of the nebulae observed, and also one of thirty-one new nebulae confirmations of which have been made by second photographs in each case. Referring to N.G.C. 6729, the nebulae attached to the variable star R. Coronas, Aust., the author states that this nebula is certainly variable, and the question as to how its variability is connected with that of the star is being studied, and is promised as a separate paper.

    Rights and permissions

    Reprints and Permissions

    About this article

    Cite this article

    Our Astronomical Column . Nature 95, 381–382 (1915) doi:10.1038/095381b0

    Download citation

    Comments

    By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.