| NASA sci. |
| Star sci. |
| NASA subj. |
| Sci. major |
| Space sci. |
| Galaxy sci. |
| Sci. branch |
| Star: Prefix |
| Palomar sci. |
| Sagan's sci. |
| Sci. subject |
| Cosmos" subj. |
| Halley's sci. |
| Hubble's sci. |
| Space: Prefix |
| Sagan's subj. |
| Kepler's subj. |
| Stellar start? |
| Galileo's sci. |
| Celestial sci. |
| Sci. for Kepler |
| Heavens: Prefix |
| Star: Comb. form |
| Celestial prefix |
| Dark matter sci. |
| Stargazers' sci. |
| Solar system sci. |
| Subj. for Galileo |
| Carl Sagan's sci. |
| Copernicus's sci. |
| Observatory subj. |
| Sci. of the stars |
| Carl Sagan's subj. |
| College sci. class |
| Sci. of Copernicus |
| Tycho Brahe's sci. |
| Sci. of stars, etc. |
| Sci. of the heavens |
| Science class: Abbr. |
| Space science: Abbr. |
| Subj. for Carl Sagan |
| Kepler was one: Abbr. |
| Sagan's calling:abbr. |
| Galileo was one: Abbr. |
| Heavenly field?: Abbr. |
| Physics dept. offering |
| Copernicus's field: Abbr. |
| Neil deGrasse Tyson subj. |
| Sagan's specialty (Abbr.) |
| Study of the stars (abbr.) |
| Man with a telescope: Abbr. |
| Observatory observer: Abbr. |
| Study of the heavens: Abbr. |
| Subj. for Neil deGrasse Tyson |
| Subj. for starry-eyed students |
| One of the hard sciences: Abbr. |
| Subj. studied by Neil deGrasse Tyson |
| Coll. major involving an observatory |
| Field in which things are looking up?: Abbr. |