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Q2: Star clusters are important to the study
Q5: As Earth _ on its axis, it
Q30: What creates a total lunar eclipse?<br>A) The
Q37: Day and night cycles are caused by
Q43: Helium fusion is sometimes referred to as
Q52: In which spectral sequence are the hottest
Q53: What causes granulation on the photosphere?<br>A) convection<br>B)
Q57: What part of the Sun's aging process
Q59: _are violations of existing criminal laws designed
Q60: Star B has an apparent visual magnitude