(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,…
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.…
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…
Scientific Origins of the UniverseTheories of the UniverseScientific Origins of the UniverseBang That DrumA Big Bang AlternativeThe Accelerating UniversePlasma CosmologyThe Standard ModelThe Alpha…
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:…
(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) 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) 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) 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…
(Encyclopedia) Mound Builders, in North American archaeology, name given to those people who built mounds in a large area from the Great Lakes to the Gulf of Mexico and from the Mississippi River to…
