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cerium

(Encyclopedia)cerium sērˈēəm [key] [from the asteroid Ceres], metallic chemical element; symbol Ce; at. no. 58; at. wt. 140.116; m.p. 799℃; b.p. 3,426℃; sp. gr. 6.77 at 25℃; valence +3 or +4. Cerium is a ...

parallax

(Encyclopedia)CE5 The trigonometric parallax of a star, expressed by the angle θ, is a measure of its apparent motion against the background of more distant stars as a result of the earth's motions in its orbit...

Sirius

(Encyclopedia)Sirius sĭrˈēəs [key], or Dog Star, brightest star in the sky. It is located in the constellation Canis Major (1992 position R.A. 6h44.8m, Dec. −16°42′); its Bayer designation is Alpha Canis M...

Grimm, Jakob

(Encyclopedia)Grimm, Jakob grĭm [key], 1786–1859, and which did much to encourage the romantic revival of folklore. Among their best-known stories are “Hansel and Gretel,” “Rapunzel,” “The Breman Town...

Hahn, Otto

(Encyclopedia)Hahn, Otto ôˈtō hän [key], 1879–1968, German chemist and physicist. His important contributions in the field of radioactivity include the discovery of several radioactive substances, the develop...

Mendel, David

(Encyclopedia)Mendel, David: see Neander, Johann August Wilhelm. ...

Raimar, Freimund

(Encyclopedia)Raimar, Freimund: see Rückert, Friedrich. ...

Paul, Jean

(Encyclopedia)Paul, Jean: see Richter, Johann Paul Friedrich. ...

Jean Paul

(Encyclopedia)Jean Paul: see Richter, Johann Paul Friedrich. ...

Jena, University of

(Encyclopedia)Jena, University of: see Friedrich Schiller University of Jena. ...