  This paper centers on the collection of accounts on solar eclipses from the
era of the Aztecs in Mesoamerica, about 1300 to 1550 AD. We present a list of
all eclipse events complying with the topological visibility from the capital
Tenochtitlan. Forty records of 23 eclipses entered the various Aztec
manuscripts (codices), usually those of large magnitude. Each event is
discussed with regard to its historical context, as we try to comprehend the
importance the Aztecs gave to the phenomenon. It seems that this culture paid
noticeably less attention to eclipses than the civilisations in the "Old
World". People did not understand the cause of it and did not care as much
about astronomy as in Babylonia and ancient China. Furthermore, we discuss the
legend on the comet of Moctezuma II. It turns out that the post-conquest
writers misconceived what the sighting was meant to be.
