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On the History and Present Situation

Published online by Cambridge University Press:  03 March 2020

P. J. E. Peebles
P. J. E. Peebles*
Affiliation:
Princeton University, Princeton New Jersey, 08544, USA email: [email protected]
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Abstract

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A common thought in the 1950s was that galaxies rotate because they are remnants of primeval currents, as in turbulence. But this idea is quite unacceptable in an expanding universe described by general relativity theory. Since we are no smarter now than in the 1950s the lesson I draw is that we do well on occasion to pause to consider whether we might be missing something. An example is the pure disk galaxies that are so common nearby and so rare in simulations. We have something to learn from this.

Keywords

galaxies: bulgesgalaxies: formationcosmology: theory
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium A30: Astronomy in Focus XXX , August 2018 , pp. 203 - 207
Copyright
© International Astronomical Union 2020

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