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3. Copernicus's field: Abbr.

Alternative clues for the word astr

• Dark matter sci
• Sagan's specialty (Abbr.)
• Study of the stars (abbr.)
• Kepler's subj.
• Sci. subject
• Tycho Brahe's sci.
• Sagan's sci
• NASA sci
• Sci. of the stars
• Observatory observer: Abbr.