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The method of spectroscopic parallax cannot be applied to stars more that about 300 light years distant.
Q2: Refracting telescopes suffer from _ aberration.
Q16: Why were quasars so mysterious when first
Q48: The spectrum of a(n)_ consists of a
Q56: Why does the average chemical composition of
Q63: What is the term for the apparent
Q72: How did observations at the Sudbury Neutrino
Q74: The process of removing an electron from
Q74: What information about orbital inclination can we
Q79: The Lyman series lines of hydrogen all
Q85: Which of the following types of light