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Period-luminosity relation
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In astronomy, a period-luminosity relation is a relationship linking the luminosity of pulsating variable stars with their pulsation period. The best-known relation is the direct proportionality law h
Plot from Leavitt's 1912 paper. The horizontal axis is the logarithm of the period of the corresponding Cepheid, and the vertical axis is its apparent magnitude. The lines drawn correspond to the stars' minimum and maximum brightness.
Plot from Leavitt's 1912 paper. The horizontal axis is the logarithm of the period of the corresponding Cepheid, and the vertical axis is its apparent
Phase lightcurve of variable star Delta Cephei.
Phase lightcurve of variable star Delta Cephei.
Large Magellanic Cloud
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The Large Magellanic Cloud is a dwarf galaxy and satellite galaxy of the Milky Way. At a distance of around 50 kiloparsecs, the LMC is the second- or third-closest galaxy to the Milky Way, after the S
Small part of the Large Magellanic Cloud
Small part of the Large Magellanic Cloud
ESO's VISTA image of the LMC
ESO's VISTA image of the LMC
Two very different glowing gas clouds in the Large Magellanic Cloud, NGC 2014 (red) and NGC 2020 (blue)
Two very different glowing gas clouds in the Large Magellanic Cloud, NGC 2014 (red) and NGC 2020 (blue)
NGC 1783 is one of the biggest globular clusters in the Large Magellanic Cloud.
NGC 1783 is one of the biggest globular clusters in the Large Magellanic Cloud.