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Chaldene

(Encyclopedia)Chaldene, in astronomy, one of the 39 known moons, or natural satellites, of Jupiter. ...

Praxidike

(Encyclopedia)Praxidike, in astronomy, one of the 39 known moons, or natural satellites, of Jupiter. ...

Themisto

(Encyclopedia)Themisto, in astronomy, one of the 39 known moons, or natural satellites, of Jupiter. ...

Taygete

(Encyclopedia)Taygete, in astronomy, one of the 39 known moons, or natural satellites, of Jupiter. ...

Jodrell Bank Observatory

(Encyclopedia)Jodrell Bank Observatory jôdˈrəl [key], observatory for radio astronomy located at Jodrell Bank, Macclesfield, England. Founded in 1945 on the site of a botanical experiment station, it is administ...

electromotive series

(Encyclopedia)electromotive series, list of metals whose order indicates the relative tendency to be oxidized, or to give up electrons (see oxidation and reduction); the list also includes the gas hydrogen. The ele...

sextant

(Encyclopedia)CE5 Sextant sextant, instrument for measuring the altitude of the sun or another celestial body; such measurements can then be used to determine the observer's geographical position or for other n...

copernicium

(Encyclopedia)copernicium, artificially produced radioactive chemical element; symbol Cn; at. no. 112; mass number of most stable isotope 285; m.p., b.p., sp. gr., and valence unknown. Situated in Group 12 of the p...

Lalande, Joseph Jérôme Lefrançais de

(Encyclopedia)Lalande, Joseph Jérôme Lefrançais de läläNdˈ [key], 1732–1807, French astronomer. Under the direction of the French Academy of Science, he went to Berlin in 1751 to make observations on the p...

sidereal period

(Encyclopedia)sidereal period, in astronomy, length of time a body takes to complete an orbit relative to the fixed stars. See sidereal time. ...