| STEADYSTATETHEORY | Obsolete hypothesis about the universe's origin |
| BIGBANG | Prevailing theory of the universe's origin (3,4) |
| BIGBANGLETHEORY | Hypothesis about the origin of bracelets? |
| STAR | Associated with a dark sky paradox propounded by Heinrich Olbers in 1823, any one of the luminous bodies forming part of the universe's two trillion galaxies (4) |
| BENAFFLECK | Actor who plays the universe's Batman in The Flash: 2 wds. |
| HEATDEATH | Alarming data leads to hypothesis extrapolating the universe's ultimate fate? (4,5) |
| YLEM | The Universe's original substance, in Cosmology |
| DARKENERGY | Theoretical property said to accelerate the universe's expansion |
| EON | One of the universe's 14, for example |
| FATE | The universe's will, so to speak |
| AGE | The universe's is around 13.8 billion years |
| DARKMATTER | Hypothetical material said to account for twenty-five per cent of the universe's total energetic density |
| QUASARS | Powered by supermassive black holes and with red shifts of up to z=7.64, ultra-luminous galactic nuclei that are some of the universe's most distant known objects (7) |
| GALAXIES | Vast systems of stars, gas, and dust that contain nearly all of the universe's visible matter (8) |
| THEBLIP | MCU event in which Thanos erases half of the universe's population |
| RIEMANN | German mathematician Bernhard with a namesake hypothesis about zeros of the zeta function |
| SETTHEORY | Hypothesis about domestic animals or hobbyhorse (3,6) |
| BIGBANKTHEORY | Hypothesis about major financial institutions? |
| PETTHEORY | Favourite hypothesis about a man and his dog? (3,6) |
| STEPHEN | A Brief History Of Time, the book about the universe of which we read little and understood less, wa |
