PART II.--SATELLITES OF PLANETS.

+--------------+-------------+-----------------+ | Mean Distance| Equatorial | Volume | Names. | from Primary | Diameter | in Cubic Miles. | | in Miles. | in Miles. | | ----------+--------------+-------------+-----------------+ | _Of the Earth._ | Moon | 238,833 2160 5,276,682,926 | | | | _Of Jupiter._ | Jo | 267,380 2252 5,980,050,000 | Europa | 425,160 2099 4,842,133,708 | Ganymede | 678,390 3436 21,240,229,268 | Callisto | 1,192,820 2929 13,157,027,273 | | | | _Of Saturn._ | Mimas | 120,800 1000 523,600,000 | Enceladus | 155,000 ? 65,450,000 | Tethys | 191,000 500 65,450,000 | Dione | 246,000 500 65,450,000 | Rhea | 343,000 1200 904,780,417 | Titan | 796,000 3300 18,816,606,060 | Hyperon | 1,007,000 ? 3,053,634,965 | | | Japetus | 2,314,000 1800 3,053,634,965 | | | | _Of Uranus._ | Ariel | 123,000 } Total mass taken at | Umbriel | 171,000 } 1/15,000th of primary | Titania | 281,000 } 1,724,977,600 | Oberon | 376,000 } | | | | _Of Neptune._ | ----- | 220,000 } Mass taken at | | } 1/40,000th of primary | | 727,680,925 | ----------+----------+-----------------+-----------------+ | Density. |Volume at Density| Total Volume at | Names. |(Water=1.)| of Water in |Density of Water | | | Cubic Miles. | in Cubic Miles.| ----------+----------+-----------------+-----------------+ | | | _Of the Earth._ | Moon | 3·438 .. 18,141,236,000 | | | | _Of Jupiter._ | Jo | 1·132 6,769,416,600 | Europa | 2·141 10,367,008,269 | Ganymede | 1·868 39,676,748,273 | Callisto | 1·472 19,367,144,146 | | ----------------- | | 76,180,317,288 | | | | _Of Saturn._ | Mimas | ... | Enceladus | ... | Tethys | ... | Dione | ... | Rhea | ... | Titan | ... Total Volume | Hyperon | ... in Cubic Miles. | | | Japetus | 0·7 36 26,548,606,407 19,539,774,315 | -----------+----------------------------------------------+