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3. Observatory subj

Alternative clues for the word astr

• Galileo's sci
• Stellar start?
• Sagan's calling:abbr
• Sci. major
• Sci. for Kepler
• Sci. of the heavens
• Kepler's subj
• NASA subj
• Sagan's specialty (Abbr.)
• One of the hard sciences: Abbr.