| ENCELADUS | Sixth-largest moon of Saturn, discovered by William Herschel in 1789 (9) |
| PHOEBE | Moon of Saturn discovered by William Pickering in 1899 (6) |
| EUROPA | Moon of Jupiter discovered by Galileo in 1610, the sixth-largest moon in the Solar System (6) |
| OBERON | Discovered by William Herschel in 1787, moon of Uranus named after the king of the fairies in A Midsummer Night's Dream (6) |
| TITANIA | Uranus' largest moon and 8th largest in the solar system, discovered by William Herschel in 1787 (7) |
| RHEA | Second-largest moon of Saturn, discovered by French-Italian astronomer Giovanni Domenico Cassini in 1672 (4) |
| IAPETUS | Third-largest moon of Saturn, discovered by Giovanni Domenico Cassini in 1671 (7) |
| URANUS | Giant planet discovered by William Herschel in 1781 |
| MIMAS | Moon of Saturn discovered in 1789 by William Herschel using his 40-foot reflector telescope (5) |
| TITAN | Largest and first known moon of Saturn, discovered by Dutch astronomer Christiaan Huygens in 1655 (5) |
| TETHYS | One of the four moons of Saturn discovered by Cassini (6) |
| CYANOTYPE | Photographic process invented by English polymath John Herschel in 1842, now known as blueprint (9) |
| PROMETHEUS | Moon of Saturn discovered in October 1980 from Voyager 1 photos (10) |
| HYPERION | Moon of Saturn discovered on September 16, 1848 (8) |
| INFRARED | What invisible rays with a heating effect were discovered by astronomer Sir William Herschel in 1800? (8) |
| UMBRIEL | One of the main satellites of Uranus, discovered by William Lassell in 1851 |
| NEON | Gaseous chemical element co-discovered by William Ramsay, used in glass tube signs (4) |
| RHODIUM | Platinum metal element, discovered by William Hyde Wollaston in 1804 |
| ASTRONOMER | Observer of the stars' movements like Caroline Herschel in the nineteenth century or Al-Battani in t |
| PHOTO | Short word for an image taken with a camera whose full name was coined by Sir John Herschel in 1839 (5) |
