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Q3: Molecular clouds are mapped using _ gas
Q13: The angular diameters of the Moon and
Q18: What forms of electromagnetic radiation from the
Q19: Objects used to map spiral arms are
Q23: The force due to the gravity between
Q35: Of the following parts of the Sun,
Q36: The intercloud medium is believed to make
Q59: Which part of a telescope is responsible
Q60: Optical telescopes are intended for the study
Q64: The _ is a thin layer of