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Published August 28, 1964 | metadata_only
Journal Article

Galaxy M 31

Arp, Halton C.


In his report "Radio map of the Andromeda galaxy" (24 July, p. 389), John M. MacLeod reported the results of observing the nearby galaxy M 31 with the new University of Illinois radio telescope. At about the same time a paper of mine appeared in the Astrophysical Journal (139, p. 1045) analyzing the spiral structure of M 31. Putting the results of the two investigations together now reveals an unexpected and intriguing puzzle.

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© 1964 American Association for the Advancement of Science. 12 August 1964.

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August 19, 2023
August 19, 2023