One can make a color-color plot by arranging stars in a two-dimensional graph, where each axis measures a different color index. Below are some examples from the SDSS, which uses a set of broadband filters called (u, g, r, i, z); they are very roughly equivalent to (U, B, R, I, _).
regime - the organization that is the governing authority of a political unit; the government reduced taxes; the matter was referred to higher authorities. authorities, government.
Regime vs. regimen. A regimen is a systematic approach to diet, medicine, or exercise. The word has other meanings, but this is its most common use. Regime can carry the same meaning, but it has additional definitionsâmainly, (1) a form of government, and (2) a government in powerâthat it doesnât share with regimen.