| DEIMOS | Smaller and outermost of the two moons of Mars, discovered by US astronomer Asaph Hall in 1877 (6) |
| PHOBOS | A moon of Mars discovered in 1877 (6) |
| HALL | Asaph, U.S. astronomer who discovered the moons of Mars (4) |
| RHYL | Resort in North Wales north of St Asaph (4) |
| DAINTY | Smaller and outer of the two moons of Mars (6) |
| PHOEBE | Largest irregular moon of Saturn, discovered by US astronomer William Henry Pickering in 1899 (6) |
| OBERON | The outermost of the major satellites of Uranus (6) |
| THEBE | Outermost of the four inner moons of Jupiter, discovered by US astronomer Stephen P. Synnott in 1979 (5) |
| ELARA | Eighth-largest of the 95 known moons of Jupiter, discovered by US astronomer Charles Dillon Perrine in 1905 (5) |
| LYSITHEA | Moon of Jupiter discovered by US astronomer Seth Barnes Nicholson in 1938, later named after an Oceanid and lover of Zeus (8) |
| IAPETUS | The outermost of Saturn's major regular moons, extraordinary because of its great contrast in surface brightness. This moon was discovered by Gian Domenico Cassini in 1671, it has a radius of 718 km ( |
| AMALTHEA | Moon of Jupiter, discovered by US astronomer Edward Emerson Barnard in 1892 (8) |
| HERSCHEL | William ---, astronomer born in Hanover who discovered two moons of Saturn (8) |
| GLUTEUSMAXIMUS | Outermost of the muscles between buttock and hip (7,7) |
| ASPARTAME | Artificial sweetener, approximately 200 times sweeter than sugar, discovered by US chemist James M. Schlatter in 1965 (9) |
| ATTU | Outermost of the Aleutian Islands |
| PLUTO | Outermost of the main planets (5) |
| ERING | Outermost of the Pentagon's five sections |
| NATURALGAS | US city routine adopted by US astronomer turning up fuel |
| ARES | The moons of Mars are named after his sons |
