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Q1: The universe can be infinite in size
Q15: What happens to active galaxies when their
Q26: Pulsating variable stars are more commonly known
Q29: The fact that the Earth is elastic
Q29: Helium burns in the core of a
Q37: What is the difference between the singularity
Q39: A series of equal periodic payments is
Q45: In a sunspot,the umbra is cooler than
Q48: Although the Sun's gravitational pull on Earth
Q64: The Hertzsprung-Russell Diagram is<br>A) a graph of