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3. Galaxy sci

Alternative clues for the word astr

• Hubble's sci
• Stargazers' sci
• NASA subj
• Subj. studied by Neil deGrasse Tyson
• Carl Sagan's subj.
• NASA sci
• Physics dept. offering
• Sci. of the heavens
• Study of the stars (abbr.)
• Kepler was one: Abbr.