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If a star's spectrum does not contain spectral lines characteristic of a certain element, can we conclude that the star does not contain that element Why or why not
Q17: An absorption spectrum is also called a
Q22: Solar flares have no known effect on
Q38: The technique called _ uses a high-speed
Q57: Pre-main-sequence stars are above and to the
Q59: The nucleus is made of _<br>A) electrons
Q61: The diagram below shows a light curve
Q67: The figure shows an image of an
Q81: In the diagram below, which point indicates
Q86: The _ of the moon is the
Q99: A nova is almost always associated with<br>A)