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Q1: Gravitational lensing occurs when _ distorts the
Q29: What is the escape velocity from the
Q29: When two atomic nuclei come together to
Q30: Elliptical galaxies appear red because they<br>A) are
Q33: Describe two early classical tests of general
Q69: Suppose a protostar shrinks in size from
Q80: Halo stars near the Sun are distinguished
Q83: When do the predictions of special relativity
Q86: What is "limb darkening"? Explain why limb
Q100: Given that astronomers cannot see our Milky