half-sphere
21Southern Hemisphere — Coordinates: 45°0′0″S 0°0′0″E / 45°S 0°E / 45; 0 …
22hemisphere — noun /ˈhɛmɪsfɪə,ˈhɛmɪsfɪər/ a) Half of the celestial sphere, as divided by either the ecliptic or the celestial equator . b) A realm or domain of activity . Syn: celestial hemisphere, terrestrial hemisphere, sphere, half sphere, half sphere,… …
23Culture of the Song Dynasty — A Song Dynasty Chinese inkstone with gold and silver markings, from the Nantoyōsō Collection, Japan The Song Dynasty (960–1279 AD) was a culturally rich and sophisticated age for China. There was blossomi …
24Stefan–Boltzmann law — The Stefan–Boltzmann law, also known as Stefan s law, states that the total energy radiated per unit surface area of a black body in unit time (known variously as the black body irradiance, energy flux density, radiant flux, or the emissive… …
25Demon core — The Demon core was the nickname given to a 6.2 kilogram (14 lb) subcritical mass of plutonium that accidentally went briefly critical in two separate accidents at the Los Alamos laboratory in 1945 and 1946. Each incident resulted in the… …
26Northern Hemisphere — Coordinates: 45°0′0″N 0°0′0″E / 45°N 0°E / 45; 0 …
27Specular highlight — Specular highlights on a pair of spheres. A specular highlight is the bright spot of light that appears on shiny objects when illuminated (for example, see image at right). Specular highlights are important in 3D computer graphics, as they… …
28Contact number — See also Kissing number in the sphere packing problem Contact number (CN) is a simple solvent exposure measure that measures residue burial in proteins.[1] The definition of CN varies between authors, but is generally defined as the number of… …
29Pearl — For other uses, see Pearl (disambiguation). Pearl Pearls General Category Mineral Chemical formula Ca …
30SonicVision — is a digitally animated planetarium music show featuring 38 minutes of music from 17 different musical artists. The content of the animation includes visions of astronomy and space travel as well as abstractions, mandalic imagery, and visual puns …
