| RAYLEIGH | Baron -, inherited title of the co-discoverer of argon whose theory or formula of molecular scattering explains why the sky appears blue (8) |
| CREED | System, doctrine, or formula of religious belief, as of a denomination. (5) |
| WATSON | James -; the co-discoverer with Francis Crick of the doublehelical structure of DNA (6) |
| RAMSAY | The Gentle Shepherd author; his portraitist son; a co-discoverer of argon; or, a seven Michelin star chef (6) |
| PTOLEMY | Astronomer whose theory of Earth at the centre of the universe remained undisputed for some 1,400 years until Nicolaus Copernicus's model in 1543 (7) |
| ADAMS | Co-discoverer of Neptune;The Hitchhiker's Guide to the Galaxy author; or, Victoria Beckham's maiden name (5) |
| THEOREM | A statement or formula that can be deduced from the axioms of a formal system by means of its rules of inference (7) |
| GABBY | Sports presenter who is one of the co-presenters of BBC Sports Personality Of The Year, ___ Logan (5) |
| REUNION | *Family get-together or, alternately, destroy the career of the co-producer of "Achtung Baby"? |
| CRICK | Co-discoverer of the contents of the circled letters |
| COPERNICUS | Polish astronomer whose theory of the solar system was published in 1543 (10) |
| NICOLAUSCOPERNICUS | Polish astronomer whose theory of the solar system was published in 1543 (8,10) |
| LARRYDAVID | One of the co-creators of Seinfeld who also voiced George Steinbrenner on the show: 2 wds. |
| HILL | Social reformer who was one of the co-founders of the National Trust (4) |
| ROBERTOWEN | Welsh social and educational reformer who established the model community at New Lanark, the cradle of the co-operative movement |
| NOBLEGASES | The ___" ___"; Isaac Asimovs account of the discoveries of argon, helium, krypton, neon, radon and xenon (5,5) |
| NEWTON | Isaac, English physicist whose theory of gravity was shaped by an apple falling on his head (6) |
| EMER | ____ McLysaght: one of the co-authors of the Aisling novels. (4) |
| SALUTATION | A standard formula of words used to begin/open a letter or speech; or, a greeting generally (10) |
| CATALAN | Western Romance language; one of the co-official languages of Spain (7) |
