pulsating
41Stellar classification — In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are… …
42Mira variable — Mira variables (  /ˈmaɪr …
43Panda crossing — The panda crossing was a type of signal controlled pedestrian crossing used in the United Kingdom from 1962 to 1967.BackgroundIn the early 1960s, the British Ministry of Transport, headed by Ernest Marples, was looking for a way to make… …
44Flatwoods monster — Infobox Paranormalcreatures Creature Name = Flatwoods Monster Image Caption = a sketch of the creature. Grouping = Extraterrestrial, or a Cryptid Sub Grouping = AKA = Braxton County Monster, Phantom of Flatwoods Country = United States Region =… …
45variable star — Astron. a star that varies markedly in brightness from time to time. Also called variable. [1780 90] * * * Star whose observed brightness varies noticeably in intensity. Pulsating variables expand and contract in cycles, pulsating rhythmically in …
46Main sequence — A Hertzsprung Russell diagram plots the actual brightness (or absolute magnitude) of a star against its color index (represented as B V). The main sequence is visible as a prominent diagonal band that runs from the upper left to the lower right.… …
47Nova — For other uses, see Nova (disambiguation). Artist s conception of a white dwarf star accreting hydrogen from a larger companion A nova (plural novae) is a cataclysmic nuclear explosion in a star caused by the accretion of hydrogen on to the… …
48Semiregular variable star — Semiregular variable stars are giants or supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities. Periods lie in the range from 20… …
49Cepheid variable — This article is about a class of pulsating stars. For the similarly named constellation, see Cepheus (constellation). Cepheids redirects here. For the fictional species, see Blind Alley . A Cepheid (  /ˈs …
50RR Lyrae variable — RR Lyrae variables are periodic variable stars, commonly found in globular clusters, and often used as standard candles to measure galactic distances. This type of variable is named after the prototype, the variable star RR Lyrae in the… …
