(Encyclopedia) interstellar matter, matter in a galaxy between the stars, known also as the interstellar medium.
The interstellar gas, which constitutes about 99% of the interstellar matter,…
ATMOSPHEREOCEANSLANDICE AND SNOWEARTH SCIENCESTUDY TECHNIQUESBIOSPHEREAXISFIND OUT MOREThe rocky ball that forms our world is one of nine planets in the Solar System. Earth is a sphere, with a…
Albert Einstein (1879–1955)AIP Niels Bohr LibraryVladimir Lenin (1870–1924)Novosti PhotosWoodrow Wilson(1856–1924)The Library of Congress Picture Collection1910Boy Scouts of America incorporated.…
Hades Takes a Wife: PersephoneClassical MythologyWhat the Hell? Adventures in the UnderworldHades Takes a Wife: PersephoneThe Cunning Rogue: SisyphusThe Not-So-Heavenly Host: TantalusUndying Love:…
Scientific Origins of the UniverseTheories of the UniverseScientific Origins of the UniverseBang That DrumA Big Bang AlternativeThe Accelerating UniversePlasma CosmologyThe Standard ModelThe Alpha…
(Encyclopedia) GnosticismGnosticismnŏsˈtĭsĭzəm [key], dualistic religious and philosophical movement of the late Hellenistic and early Christian eras. The term designates a wide assortment of sects,…
(Encyclopedia) Mendel, Gregor JohannMendel, Gregor Johanngrāˈgôr yōˈhän mĕnˈdəl [key], 1822–84, Austrian monk noted for his experimental work on heredity. He entered the Augustinian monastery in Brno…
(Encyclopedia) nickel, metallic chemical element; symbol Ni; at. no. 28; at. wt. 58.6934; m.p. about 1,453℃; b.p. about 2,732℃; sp. gr. 8.902 at 25℃; valence 0, +1, +2, +3, or +4.
Nickel is a hard,…
(Encyclopedia) radar, system or technique for detecting the position, movement, and nature of a remote object by means of radio waves reflected from its surface. Although most radar units use…
palmA hand-held computer. PCPersonal computer. Generally refers to computers running Windows with a Pentium processor.printed circuit boardPC boardPrinted Circuit board. A board printed or etched…
