The two Rome halo displays of 1629 and 1630 are prominent in the early halo literature, and the 1629 display is still cited today for having contained a circular halo. We have examined seventeenth century correspondence and publications in order to learn as much as possible about the existing documentation of the two displays. We find the documentation to be too weak to support a definitive interpretation of either display, and we see little evidence for a halo or for other rare halos. The two displays remain important for their role in initiating modern halo science.
© 2008 Optical Society of AmericaFull Article | PDF Article
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