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Both the CNO cycle and the proton-proton fusion chain convert hydrogen to helium using catalysts.
Q3: To initiate star formation in a cloud,
Q7: The Crab pulsar emits light in which
Q25: The figure shows an image of an
Q41: As shown in the following image, rising
Q80: Which of the following can't be associated
Q81: When a binary system loses orbital energy,
Q118: For a star of Sun-like mass, what
Q121: Which of the following is suggested as
Q139: The unified model describes active galactic nuclei
Q172: Some giants and/or supergiants are less dense