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Q25: Astronomers use roman numerals to indicate the
Q39: During a helium flash,what happens to the
Q53: During the Kelvin-Helmholtz contraction phase,a protostar has
Q67: How does solar luminosity vary during the
Q85: What element are most white dwarfs primarily
Q90: Dust particles and magnetic fields in the
Q96: What is characteristic of a main sequence
Q104: RR Lyrae stars pulsate,but with shorter periods
Q104: What explanation does general relativity provide for
Q105: On the Sun,what takes approximately 22 years