first-event observations
121Spirit rover — (MER A) Artist s concept of Rover on Mars Operator NASA Mission type Rover Launch date …
122Balfour Stewart — Infobox Scientist name = Balfour Stewart box width = image width = 150px caption = Balfour Stewart birth date = November 1, 1828 birth place = Edinburgh, Scotland death date = December 19, 1887 death place = Ballymagarvey, Balrath, County Meath,… …
123National Australian Convention of Amateur Astronomers — The National Australian Convention of Amateur Astronomers (NACAA) is a biennial national forum for amateur astronomy in Australia. In 1966 two enthusiastic amateur astronomical groups, the James Cook Astronomers Club and the Canberra Astronomical …
124global warming — an increase in the earth s average atmospheric temperature that causes corresponding changes in climate and that may result from the greenhouse effect. [1975 80] * * * Potential increase in global average surface temperatures resulting from… …
125science, philosophy of — Branch of philosophy that attempts to elucidate the nature of scientific inquiry observational procedures, patterns of argument, methods of representation and calculation, metaphysical presuppositions and evaluate the grounds of their validity… …
126pre-Columbian civilizations — Introduction the aboriginal American Indian (Mesoamerican Indian) cultures that evolved in Meso America (part of Mexico and Central America) and the Andean region (western South America) prior to Spanish exploration and conquest in the 16th …
127Deep Impact (spacecraft) — For other uses, see Deep Impact (disambiguation). Deep Impact Artist s conception of the Deep Impact space probe after impactor separation. Operator NASA / JPL Major contractors Ball Aerospace, JPL …
128Comet Shoemaker-Levy 9 — Shoemaker Levy redirects here. For other Shoemaker Levy comets see List of periodic comets. Infobox Comet name=SL9 (Shoemaker Levy) caption=Image of Comet Shoemaker Levy 9 fragments (total: 21), taken on May 17, 1994 discoverer= Carolyn Shoemaker …
