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Published online by Cambridge University Press: 15 February 2018
The subject of normal galaxies is much too large to cover even superficially in this paper, and I shall necessarily be giving a very limited and incomplete review. I shall tend to emphasize elliptical and peculiar galaxies at the expense of spirals, partly from personal interest, but largely because the Space Telescope will break more new ground in our knowledge of the former. Because we live in one, we have quite detailed knowledge about the structure and contents of at least one spiral galaxy Therefore, the fact that the Space Telescope will allow us to study M31 in the same detail that the Magellanic Clouds can be studied from the ground, and to study spirals in the Virgo Cluster in the same detail that we have been able to study M31 is less important than, for example, the fact that we will be able to directly observe, for the first time, the stellar content of an elliptical galaxy.