(Encyclopedia) physics, branch of science traditionally defined as the study of matter, energy, and the relation between them; it was called natural philosophy until the late 19th cent. and is still…
(Encyclopedia) mathematics, deductive study of numbers, geometry, and various abstract constructs, or structures; the latter often “abstract” the features common to several models derived from the…
(Encyclopedia)
CE5
The asteroid belt lies between the orbits of Mars and Jupiter. Gaps where no asteroids are found are called Kirkwood gaps. The Trojan asteroids share Jupiter's orbit with the…
(Encyclopedia)
CE5
A. Nimbus weather satellite
B. Syncom communications satellite
satellite, artificial, object constructed by humans and placed in orbit around the earth or other celestial body…
(Encyclopedia)
CE5
Moon mission assembly
CE5
Stages in a moon mission shown counterclockwise from launching on the first day to splashdown on the ninth day.
space exploration, the…
(Encyclopedia) opera, drama set to music.
In the early part of the 20th cent. the foremost operatic composer was Richard Strauss. Although influenced by Wagner, he composed operas with even richer…
(Encyclopedia)
CE5
Mirror arrangements for a reflecting telescope
telescope, traditionally, a system of lenses, mirrors, or both, used to gather light from a distant object and form an image of…
(Encyclopedia) science [Lat. scientia=knowledge]. For many the term science refers to the organized body of knowledge concerning the physical world, both animate and inanimate, but a proper…
