| 100% | MESSIER | 7 | French astronomer who discovered 110 objects |
| 48% | HERSCHEL | 8 | Astronomer who discovered Uranus |
| 47% | HERSCHEL | 8 | Astronomer who discovered Uranus: William __ |
| 46% | HUBBLE | 6 | Astronomer who discovered other galaxies in 1924 |
| 46% | HERSCHEL | 8 | William __; astronomer who discovered Uranus |
| 45% | GALILEO | 7 | Astronomer who discovered the main moons of Jupiter |
| 45% | LAPLACE | 7 | French astronomer who wrote the seminal "Celestial Mechanics" |
| 45% | VOLTA | 5 | Alessandro ___, scientist who discovered 110-Across |
| 44% | HERSCHEL | 8 | William —, astronomer who discovered Uranus in 1781 |
| 44% | HERSCHEL | 8 | William, astronomer who discovered Uranus in 1781 |
| 43% | COURTOIS | 8 | French chemist who discovered iodine: Barnard __ |
| 43% | HERSCHEL | 8 | William —, astronomer who discovered the planet Uranus in 1781 |
| 41% | LAPLACE | 7 | French astronomer/mathematician who wrote "Traité de Mécanique Céleste" |
| 37% | LALANDE | 7 | Jerome —, French astronomer after whom a crater on the Moon is named |
| 37% | JEANPICARD | 10 | 17th-century French astronomer who measured the size of the Earth to a reasonable degree of accuracy |
| 36% | GALILEO | 7 | Astronomer who was the first to discover that the Milky Way was made up of stars |
| 35% | CARTIER | 7 | Jacques —, French explorer who discovered St Lawrence River, Canada |
| 34% | CARTIER | 7 | Jacques —, French explorer who discovered the St Lawrence River, Canada |
| 33% | MARIA | 5 | ___ Mitchell, astronomer who was the first female professor of astronomy and the first American to discover a comet |
| 32% | MESSIER | 7 | French astronomer charles |
| 31% | NOONE | 5 | Who discovers the perfect crime |
| 30% | LAPLACE | 7 | French astronomer and marquis, Pierre-Simon |
| 30% | TYCHOBRAHE | 10 | Astronomer who coined the word "nova" |
| 30% | SAGAN | 5 | Astronomer who wrote "Pale Blue Dot" |
| 30% | BRAHE | 5 | Astronomer who coined the term "nova" |
| 30% | BRAHE | 5 | Astronomer who established the Uraniborg observatory |
| 30% | DRE | 3 | "Dr." who discovered Eminem |
| 30% | ISAAC | 5 | Physicist who discovered gravity |
| 30% | FLEMING | 7 | Scientist who discovered Penicillin |
| 30% | FLEMING | 7 | Alexander who discovered penicillin |