| HUBBLESLAW | Astronomical observation that galaxies move away from Earth at a rate proportional to their distance from Earth |
| PARSEC | A unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc. |
| MOONSTONE | It wouldn't cost the Earth at a jeweller's! (9) |
| GST | Astronomical observation std. |
| STAR | Astronomical observation |
| LAW | Poe's ___ (observation that online satire is often indistinguishable from the stuff it's mocking) |
| PAPERCUP | Page after page containing observation that may hold water |
| YOURROOTS | With 56-Across, hairstylist's observation (that also applies to 17-, 25- and 34-Across?) |
| CREST | Whenever a male peacock fans his tail, he shakes it at a rate of 26 times a second, creating a pressure-wave that literally rattles the female's head (___) for attention during courtship |
| EDWINHUBBLE | US astronomer whose eponymous law states that the velocity of a galaxy is proportional to its distance from the observer (5,6) |
| EDWIN | US astronomer (1889-1953) whose eponymous law states that the velocity of a galaxy's recession is proportional to its distance from the observer (5) |
| HUBBLE | US astronomer (1889-1953) whose eponymous law states that the velocity of a galaxy's recession is proportional to its distance from the observer (6) |
| OHMSLAW | What states that electric current is proportional to voltage and inversely proportional to resistance? (4,3) |
| THETA | A type of wave occuring at a rate of 4 to 7 herz |
| GALILEO | First person to use a telescope to make astronomical observations (7) |
| PUSHBACK | Move away from the gate, at the airport: 2 wds. (Theme answer: A word seen on a door handle is followed by a synonym for "to the rear.") |
| SECOND | Newton's ___ law of motion states that the rate of change of momentum of a body is directly proportional to the external force acting on it (6) |
| BOYLE | Who stated the law that the pressure of a given mass of gas is inversely proportional to its volume at constant temperature (5) |
| ANALOG | (electronics) Of a circuit or device having an output that is proportional to the input. |
| COMMISSION | Payment to an agent proportional to the amount involved in a transaction (10) |
