centennial proper motion
21Canada — /kan euh deuh/, n. a nation in N North America: a member of the Commonwealth of Nations. 29,123,194; 3,690,410 sq. mi. (9,558,160 sq. km). Cap.: Ottawa. * * * Canada Introduction Canada Background: A land of vast distances and rich natural… …
22Tropical year — A tropical year (also known as a solar year), for general purposes, is the length of time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox,… …
23Schubert's last sonatas — The three piano sonatas numbered 958 through 960 in Deutsch s catalogue of Franz Schubert s complete works, are the composer s last major compositions for the piano, often referred to in short simply as Schubert s last sonatas. They were written… …
24building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
25University of Waterloo — seal Motto Concordia cum veritate Motto in English In harmony with truth Established 1957 …
26Early flight — This article is a listing of primarily pre 20th century flying machines and work, and an analysis of the debates over early flying machines. The goal is to examine the properties of flying machines, and to list the claims to allow a proper… …
27environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
28Mass–energy equivalence — E=MC2 redirects here. For other uses, see E=MC2 (disambiguation). 4 meter tall sculpture of Einstein s 1905 E = mc2 formula at the 2006 Walk of Ideas, Berlin, Germany In physics, mass–energy equivalence is the concept that the …
29Coat of arms of Canada — infobox coat of arms name = The Arms of Her Majesty in Right of Canada image width = 250 year adopted = 1921 armiger = Canada shield = Tierced in fess: Top two fesses quarterly the coats of arms of England, Scotland, Ireland, and royal France;… …
30Mustafa Kemal Atatürk — Atatürk redirects here. For other uses, see Atatürk (disambiguation). Mustafa Kemal Atatürk …
