| TOMBAUGH | Clyde --, American astronomer who discovered Pluto (8) |
| HERSCHEL | William ___, astronomer who discovered the planet Uranus in 1781 (8) |
| HYPERION | This moon is notable in that it has no regular rotation period but tumbles in an apparently random fashion in its orbit. It was discovered in 1848 by the American astronomers William Bond and George B |
| DRAPER | Henry, American astronomer who contributed to stellar classification and spectroscopy (6) |
| SAGAN | Carl --, American astronomer who presented the TV series 'Cosmos' (5) |
| HUBBLE | American astronomer who devised a classification system for galaxies in the 1920s (6) |
| LOWELL | Flagstaff observatory that discovered Pluto |
| CLYDE | US astronomer who discovered the dwarf planet Pluto in 1930 (5,8) |
| CARL | ___ Sagan American astronomer and scientist who wrote the book Cosmos |
| PHOEBE | This moon was discovered by the American astronomer William Henry Pickering in 1899. Roughly spherical and about 210 km (130 miles) in diameter, this moon has a mean distance from Saturn of about 12,9 |
| GALILEO | Astronomer who discovered the main moons of Jupiter |
| HALL | Asaph, U.S. astronomer who discovered the moons of Mars (4) |
| PHILIBERT | -- Jacques Melotte, British astronomer who discovered a moon of Jupiter (9) |
| LASSELL | Astronomer who discovered Neptune's moon Triton (7) |
| KEPLER | German astronomer who discovered and captured the laws of planetary motion |
| HAIL | Acknowledge an American astronomer in speech |
| CARLSAGAN | American astronomer; author of 1985 novel Contact (4,5) |
| WHALE | Swimmer in school with American astronomer |
| EDWIN | American astronomer after whom the orbiting space telescope was named, ... Hubble |
| HIPPARCHUS | Cool and dry American astronomer (10) |
