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The most massive main-sequence stars are the ________ spectral class and the ________ luminosity class.
Q1: Which object can be a pulsar<br>A)white dwarf<br>B)neutron
Q44: When an aging massive star generates an
Q56: The _ of a star is a
Q66: A _ is used to produce and
Q82: Why does our theory predict that neutron
Q83: Since an electron is so less massive
Q83: The first scientific attempt to map the
Q96: Blue stars are hotter than red stars.
Q115: What advantages does a large-diameter astronomical telescope
Q134: Helioseismology is the study of the differential