Mitton, G. E. (Geraldine Edith) · London, A. and C. Black · leaf 99
ese curious bodies which at first he could 72 THE CHILDRENS BOOK OF STARS not believe to be moons. The four which he saw-vary in size from two thousand one hundred milesin diameter to nearly three thousand six hundred.You remember our own moon is two thousandmiles across, so even the smallest is… … JUPITKR AND HIS PRINClPAJj MOONS. discovered in the band of Jupiters satellites—onea small moon closer to him than any of the firstset, and two others further out. It was by observa-tion of the first four, however, that very interestingresults were obtained. Mathematicians calculatedthe time that…
Astronomy
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