variable+cloud

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• Variable star — A star is classified as variable if its apparent brightness as seen from Earth changes over time, whether the changes are due to variations in the star s actual luminosity, or to variations in the amount of the star s light that is blocked from… …   Wikipedia

• Cloud base — This article refers to meteorology. For the airborne base of the TV series Captain Scarlet and the Mysterons, see Cloudbase. The cloud base (or the base of the cloud) is the lowest altitude of the visible portion of the cloud. It is traditionally …   Wikipedia

• Cloud — For other uses, see Cloud (disambiguation). Cumulus cloudscape over Swifts Creek, Australia A cloud …   Wikipedia

• Cloud top — Mountains often reach above the cloud top The cloud top (or the top of the cloud) is the highest altitude of the visible portion of the cloud. It is traditionally expressed either in metres above the Earth (or planetary) surface, or as the… …   Wikipedia

• cloud ring — noun : a ring of clouds; specifically : the nearly permanent belt of clouds along the equator * * * cloud ring, the cloudy zone of calms and variable winds extending some distance on each side of the equator …   Useful english dictionary

• Small Magellanic Cloud — Small Magellanic Cloud. Source: Digitized Sky Survey 2 Observation data (J2000 epoch) …   Wikipedia

• Cepheid 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 …   Wikipedia

• Classical Cepheid variable — Classical Cepheids (also known as Population I Cepheids, Type I Cepheids, or Delta Cephei variables) are a type of Cepheid variable star. They are population I, variable stars that exhibit pulsation periods in the order of a few days to months,… …   Wikipedia

• Molecular cloud — See also: Solar nebula Within a few million years the light from bright stars will have boiled away this molecular cloud of gas and dust. The cloud has broken off from the Carina Nebula. Newly formed stars are visible nearby, their images… …   Wikipedia

• Semiregular 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… …   Wikipedia

• Orion variable — An Orion variable is a variable star which exhibits irregular and eruptive variations in its luminosity and is typically associated with diffuse nebulae. It is thought that these are young stars which will later become regular, non variable stars …   Wikipedia