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The star's _ _ plays the major role in determining its main sequence position and luminosity.
Q3: Emission nebulae like M42 occur only near
Q5: Generally speaking, as the number of the
Q35: Which of the following is an example
Q37: Whether or not your research project is
Q45: Describe the various ways that stellar masses
Q66: Why was Copernicus' model much simpler than
Q89: Conditions inside the darkest, densest nebulae are
Q107: The vernal equinox marks the beginning of
Q113: From a distance of 1 AU, the
Q127: A star has a parallax of .05".