| 100% | ASTRONOMY | 9 | The study of planets and other objects in space |
| 52% | ASTRONOMY | 9 | Poem by A. E. Housman which is also the study of celestial objects and space phenomena |
| 52% | ASTRONOMY | 9 | Scientific study of celestial objects, space and the universe as a whole |
| 49% | ASTRONOMY | 9 | The study of stars and planets |
| 49% | ASTRONOMY | 9 | The study of space and the universe |
| 48% | TELEOLOGY | 9 | The study of design and purpose in material world |
| 47% | ASTRONOMY | 9 | Study of space, stars, and objects |
| 47% | BLACKHOLES | 10 | Objects of study for Roger Penrose, Reinhard Genzel, and Andrea Ghez, recipients of the Nobel Prize in Physics (October, 2020) |
| 47% | ASTRONOMY | 9 | Study of stars, space and the universe |
| 47% | ASTRONOMY | 9 | Study of objects in space |
| 46% | ASTRO | 5 | Study of the stars and planets, for short |
| 42% | POLESAPART | 10 | In complete opposition ... and a feature of the four other longest answers |
| 42% | MAE | 3 | Jemison in the Space and Women's Halls of Fame |
| 41% | ASTROLOGY | 9 | Study of the movements and relative positions of celestial bodies in order to divine information about human affairs |
| 40% | SYMBOLOGY | 9 | The study of signs and motifs |
| 40% | ONCOLOGY | 8 | The study of tumors and cancer |
| 40% | ECONOMICS | 9 | The study of money and markets |
| 40% | TRIBOLOGY | 9 | The study of friction and lubrication |
| 40% | ETHICS | 6 | The study of right and wrong |
| 40% | CRYOLOGY | 8 | The study of snow and ice |
| 40% | OENOLOGY | 8 | The study of wine and winemaking |
| 40% | SEMIOLOGY | 9 | The study of signs and meaning |
| 40% | SEMANTICS | 9 | The study of the meaning in language |
| 40% | ETYMOLOGY | 9 | The study of word origins and meanings |
| 40% | GEOGRAPHY | 9 | The study of the Earth and its features |
| 40% | GEOLOGY | 7 | The study of the Earth, rocks and minerals |
| 39% | GEMMOLOGY | 9 | The study of precious and semi-precious stones |
| 39% | MYCOLOGY | 8 | The study of fungi, including yeast and mushrooms |
| 39% | BOTANY | 6 | The study of plants, their structure and ecology |
| 39% | GEOGRAPHY | 9 | The study of Earth's features and places |