THE WHITE SPOT ON JUPITER'S THIRD SATELLITE.
Referring to the white spot near the norm limb of Jupiter's third sate .i observed by deuor aose Comas Sola, in November, 1906, Prof. Barnard directs attention to the fact that he ‘ observed the same, or a similar, spot some fourteen years ago, and that, as in Senor Sola’s observations, it was only seen when, the satellite was following Jupiter. This leads to the assumption that this feature cannot be a, true polar cap in the sense of its being at the pole, or it would bo seen egual faculty in all parts of the satellite's orbit. Further, if this white spot is an extra-polar marking, and. is only visible in certain points of the satellite's orbit with respect to the earth, it indicates that Jupiter's third moon, like earth's satellite, always keeps the same face towards its primary.
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Bibliographic details
New Zealand Times, Volume XXIX, Issue 6270, 25 July 1907, Page 6
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146THE WHITE SPOT ON JUPITER'S THIRD SATELLITE. New Zealand Times, Volume XXIX, Issue 6270, 25 July 1907, Page 6
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