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A group of 10 to 100 stars that formed at the same time but are so widely scattered in space their mutual gravity cannot hold them together is called
Q11: A single human cell encloses about 1.5
Q13: The traditional theory states that the galaxy
Q21: How is a luminosity class assigned to
Q27: What was the temperature of the universe
Q30: The diagram below shows a cross section
Q34: The Viking landers searched for life on
Q51: Why do astronomers use the molecule CO,
Q83: _ are star-like objects that contain less
Q108: Astronomers now speculate that a galaxy s
Q132: _ are neutron stars that have magnetic