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1. Thus, the Cepheid variables, via the Period-Luminosity relation, are an important link to the longer range distance indicators. Advantages of Using Cepheids as Distance Indicators. It is advantageous to use Cepheid variable stars as distance indicators for a number of reasons. For one, the Period-Luminosity relation is fairly well established.

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3. Jun 28,  · *** If You are the one who owns a copyright for this track and you do not wish to have this kind of promotion on YouTube, please let me know and .

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4. Jul 31,  · Orienting us with an insider’s tour of our cosmic home, the Milky Way, William Waller and Paul Hodge then take us on a spectacular journey, inviting us to probe the exquisite structures and dynamics of the giant spiral and elliptical galaxies, to witness colliding and erupting galaxies, and to pay our respects to the most powerful galaxies of all―the destchaltihicokerorithedowardi.coinfos: 8.

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5. A Cepheid variable star one of a class of variable stars whose periods (i.e., the time for one cycle) of variation tend to be proportional to their luminosity and that are therefore useful in measuring interstellar and intergalactic distances. Most are spectral type F (moderately hot) at.

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6. Cepheid variables are divided into two subclasses which exhibit markedly different masses, ages, and evolutionary histories: classical Cepheids and type II Cepheids. Delta Scuti variables are A-type stars on or near the main sequence at the lower end of the instability strip and were originally referred to as dwarf Cepheids.

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7. Aug 02,  · A team of researchers at the University of Warsaw has created the most accurate 3-D model of the Milky Way Galaxy to date. In their paper published in the .

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8. Nov 24,  · Space is supported by its audience. including a pulsating star called a Cepheid variable. The two main ideas for howto measurethese stars' masses have so far produced vastly different .

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