velocity of progress
51Neutrino — For other uses, see Neutrino (disambiguation). Neutrino/Antineutrino The first use of a hydrogen bubble chamber to detect neutrinos, on November 13, 1970. A neutrino hit a proton in a hydrogen atom. The collision occurred at the point where three …
52Philosophiæ Naturalis Principia Mathematica —   Title page of Principia , first edition (1687) Original title …
53Mars Science Laboratory — mission 2011 concept artwork Operator NASA Major contractors Boeing Lockheed Martin …
54Tests of general relativity — General relativity Introduction Mathematical formulation Resources Fundamental concepts …
55radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …
56Milky Way Galaxy — Large spiral galaxy (roughly 150,000 light years in diameter) that contains Earth s solar system. It includes the multitude of stars whose light is seen as the Milky Way, the irregular luminous band that encircles the sky defining the plane of… …
57space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …
58Speed of light — The speed of light in the vacuum of free space is an important physical constant usually denoted by the letter c . [NIST and BIPM practice is to use c 0 for the speed of light in vacuum in accord with international standard ISO 31 5. See… …
59Hendrik Wade Bode — Infobox Scientist name = Hendrik Wade Bode image width = 162 caption = Hendrik Wade Bode birth date = birth date|1905|12|24|df=y death date = death date and age|1982|6|21|1905|12|24|df=y birth place = Madison, Wisconsin death place = Cambridge,… …
60star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …
