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Q24: Imagine another solar system, with a star
Q25: What practical value did astronomy offer to
Q47: In any particular place on Earth, certain
Q50: How do we know that there can
Q67: According to the Big Bang theory, why
Q81: You find yourself in a very low-
Q97: In South Africa, it's usually quite warm
Q98: Imagine an advanced civilization living on a
Q105: Most of the current star formation in
Q151: Compared to spiral galaxies, elliptical galaxies are<br>A)bluer