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    Article

    An almost head-on collision as the origin of two off-centre rings in the Andromeda galaxy

    The Andromeda galaxy (Messier 31) is big in galaxy evolution studies, since it is the nearest giant spiral galaxy, and one of the largest in the Local Group. It also looks odd, and its appearance has long puzz...

    D. L. Block, F. Bournaud, F. Combes, R. Groess, P. Barmby, M. L. N. Ashby in Nature (2006)

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    Chapter and Conference Paper

    The Hubble Tuning Fork Strikes a New Note

    Astronomers have for decades referred to the Hubble Tuning Fork. We show that the actual originator of the Tuning Fork is that of Sir James Jeans. We next focus our attention on the duality of spiral structure an...

    D. L. Block, K. C. Freeman, I. Puerari in Penetrating Bars through Masks of Cosmic D… (2004)

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    Chapter and Conference Paper

    Dust Penetrated Morphology in the High Redshift Universe

    Images from the Hubble Deep Field (HDF) North and South show a large percentage of dusty, high redshift galaxies whose appearance falls outside traditional classification systems. The nature of these objects i...

    D. L. Block, I. Puerari, M. Takamiya in New Quests in Stellar Astrophysics: The Li… (2002)

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    Chapter and Conference Paper

    Each Chairperson Reflects on Their Session...

    Editorial comment: Some of the Chairpersons have provided us with a summary of the papers presented in their session, while others have given a summary of the discussion following the papers. We trust that reader...

    D. L. Block, J. M. Greenberg in New Extragalactic Perspectives in the New South Africa (1996)

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    Chapter and Conference Paper

    K’-band observations of the Evil Eye Galaxy and the implied K’-band dust albedo

    We are reporting the result of a new analysis of the observations of reddening and attenuation produced by the remarkable dust feature in the galaxy NGC 4826 (Evil Eye Galaxy), published by Witt et al. (1994)....

    A. N. Witt, J. K. Petersohn, R. S. Lindell, D. L. Block in Spiral Galaxies in the Near-IR (1996)