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Q18: Mass is transferred from a normal star
Q24: Astronomers before Shapely underestimated the size of
Q41: A gas in which the pressure no
Q45: The age of a star cluster can
Q45: The energy emitted by the Sun comes
Q51: The _ force binds atomic nuclei.
Q63: The density of the Universe is<br>A)equal to
Q94: On the H-R diagram, lines of constant
Q120: Which one of the methods below enables
Q121: The Andromeda spiral galaxy is almost edge-on