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When a star with a mass comparable to that of the Sun dies,it becomes a black hole.
Q37: What did the experiment by Michelson and
Q45: Edwin Hubble measured the distance to the
Q51: Elliptical galaxies are primarily made up of
Q51: If you took a random sample of
Q59: About how many times larger are the
Q61: Which of the following can the strength
Q65: What type of galaxy has an elongated
Q75: Why are protostars difficult to observe?<br>A) The
Q77: What would happen if the nuclear reactions
Q89: The Sun contains a lot of hot