Related Clues:

• Star sci.
• Science class: Abbr.
• Sci. of stars
• Copernicus's sci.
• Sci. subject
• Carl Sagan's subj.
• Sci. of the heavens
• Galileo's sci.
• Heavenly field?: Abbr.
• Observatory observer: Abbr.
• Space: Prefix
• Sci. of Copernicus
• NASA subj.
• Study of the heavens: Abbr.
• Field in which things are looking up?: Abbr.