WebJun 7, 2016 · A Cepheid variable is a type of star that pulsates radially, varying in both diameter and temperature and producing changes in brightness with a well-defined stable period and amplitude. A strong direct relationship between a Cepheid variable’s luminosity and pulsation period established Cepheids as important indicators of cosmic benchmarks … WebNov 15, 2024 · A Cepheid variable (/ˈsɛfiːɪd, ˈsiːfiːɪd/) is a type of star that pulsates radially, varying in both diameter and temperature and producing changes in brightness with a well-defined stable period and amplitude. This discovery allows one to know the true luminosity of a Cepheid by simply observing its pulsation period.
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WebFeb 9, 2024 · YZ Boo is a single star that pulsates radially and so causing a brightness fluctuation. The process behind this is essentially the same as in Cepheid variables. Main sequence stars are in equilibrium. There is an outward force due to the internal pressure which depends on the temperature and an inward force due to gravity. WebJan 26, 2024 · These tools include the Hubble telescope, which made measurements on Cepheid stars, a type of extremely bright star that pulsates radially in a predictable way, as well as exploding stars called ... the converter shop in canada
Which of the following is a consequence of hubble’s law? - Law info
WebBecause it is what is known as a Cepheid variable star – i.e. a star that pulsates radially, varying in both temperature and diameter to produce brightness changes – its distance to our Sun has been the subject of revision. WebApr 29, 2024 · The correct option is the second one i.e. the spectra of Cepheid variables that are only in our galaxy are red-shifted.. Cepheid variable. The type of star which pulsates radially and varies in diameter and temperature is known as the Cepheid variable.. Now, the Cepheid variables are used to measure long distances from which we can indicate the … WebMay 2, 2024 · A Cepheid variable is a type of star that pulsates radially, varying in diameter and temperature and producing changes in brightness with a well-defined stable period and amplitude. This discovery allows one to know the actual luminosity of a Cepheid by simply observing its pulsation period. Cepheid Variables are very luminous stars, 500 to 300,000 … the convert poem