Abstract
JUPITER is now coming into a favourable aspect in the morning hours. His position about ten degrees south of the equator will, however, be an unfortunate circumstance for European observers. To those, however, who can command an open southern sky, there will be plenty of opportunities for successful research; and.certainly, this magnificent planet deserves all the study that can be possibly devoted to him. In 1899 it is to be hoped that a great number of drawings will be made, and that the latitudes of the belts and spots will be micro-metrically determined. We also require a fresh and extensive series of the times of transit of the principal light and dark markings, so that their longitudes and rate of drift relatively to the zero meridian may be ascertained. The latter element requires close attention at every opposition, as the velocities of the various currents are frequently changing, and it is possible they are regulated in definite cycles.
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DENNING, W. Jupiter and his Markings. Nature 59, 209 (1898). https://doi.org/10.1038/059209a0
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DOI: https://doi.org/10.1038/059209a0