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3. Hubble's sci

Alternative clues for the word astr

• Kepler's subj
• Carl Sagan's sci
• Solar-system sci
• Sci. of Copernicus
• Kepler was one: Abbr.
• Heavens: Prefix
• Sagan's calling:abbr
• Study of the heavens: Abbr.
• Man with a telescope: Abbr
• Kepler's subj.