like+an+ellipse
41Hyperbola — This article is about a geometrical curve, a conic section. For the term used in rhetoric, see Hyperbole …
42The Adventures of Tintin (TV series) — infobox television show name = The Adventures of Tintin caption = Tintin and Snowy, as seen on the show s opening sequence. format = Animated Series Adventure runtime = 25 minutes (approx. per episode) creator = Hergé (characters) starring =… …
43optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… …
44Christmas in the post-War United States — New Orleans department store Santa Claus, 1954 Christmas in the United States during the post War years (1946–1964) reflected a period of peace, productivity, and prosperity. Americans staged sumptuous Christmases and enjoyed a variety of holiday …
45Asteroid-impact avoidance — Planetary defense redirects here. For defending against alien invasion in fiction, see alien invasion. Artist s impression of a major impact event. The collision between Earth and an asteroid a few kilometres in diameter releases as much energy… …
46Whewell’s philosophy of science and ethics — Struan Jacobs ON SCIENCE Introduction Among the most prodigious of English minds of the nineteenth century, William Whewell (1794–1866) was at various times, and among other things, philosopher, intellectual historian, scientist, educationist,… …
47Optics — For the book by Sir Isaac Newton, see Opticks. Optical redirects here. For the musical artist, see Optical (artist). Optics includes study of dispersion of light. Optics is the branch of …
48Scale (map) — The scale of a map is defined as the ratio of a distance on the map to the corresponding distance on the ground. If the region of the map is small enough for the curvature of the Earth to be neglected, then the scale may be taken as a constant… …
49Oval — For other uses, see Oval (disambiguation). An oval with two axes of symmetry constructed from four arcs (top), and comparison of blue oval and red ellipse with the same dimensions of short and long axes (bottom) …
50Laplace–Runge–Lenz vector — Throughout this article, vectors and their magnitudes are indicated by boldface and italic type, respectively; for example, left| mathbf{A} ight| = A. In classical mechanics, the Laplace–Runge–Lenz vector (or simply the LRL vector) is a vector… …
