| #19, aired 2023-05-24 | IN THE WORLD CAPITAL $1,000 (Daily Double): The Zytglogge tower & astronomical clock, which inspired Einstein & his special theory of relativity Bern |
| #8581, aired 2022-02-21 | SPACE: KIND OF HUGE $400: A planetoid called Farfarout is the most distant object in our solar system at 132 A.U.s, short for this; 1 A.U. is 93 million miles astronomical unit |
| #8327, aired 2021-02-02 | "A" IS FOR ASTRONOMICAL $400: 2 impact craters in the Sea of Tranquility are named for these 2 men Aldrin & Armstrong |
| #8327, aired 2021-02-02 | "A" IS FOR ASTRONOMICAL $800: If you strain your eyes a bit, you can see this spiral galaxy aka M31 without using a telescope Andromeda |
| #8327, aired 2021-02-02 | "A" IS FOR ASTRONOMICAL $1200: Absolute magnitude measures a celestial object's true brightness; this other magnitude is its brightness as seen from Earth the apparent magnitude |
| #8327, aired 2021-02-02 | "A" IS FOR ASTRONOMICAL $1600: It's the diameter of a telescope's main lens or mirror the aperture |
| #8327, aired 2021-02-02 | "A" IS FOR ASTRONOMICAL $2000: (Sarah of the Clue Crew shows map imagery of the Moon on the monitor.) Possibly caused by magnetized lava under the Moon's surface, lunar swirls are easy to spot because of a high one of these reflective ratios of light relative to the surrounding surface albedo |
| #8118, aired 2019-12-18 | IT'S ASTRONOMICAL $1200: This word for a tenuous mass of interstellar dust & gas is Latin for "cloud" a nebula |
| #7333, aired 2016-06-29 | TIME FOR SPACE $800: (Sarah of the Clue Crew presents an astronomical illustration on the monitor.) The red region around a star is too hot for a planet to have liquid water, & the blue region is too cold; the green region, where conditions are just right for liquid water, is the habitable zone, nicknamed this for a storybook character Goldilocks |
| #6633, aired 2013-06-19 | ASTRONOMERS $2,000 (Daily Double): A type of this astronomical object is named for Karl Schwarzschild; his name should give you a hint a black hole |
| #6456, aired 2012-10-15 | "SIN" FULL $2,000 (Daily Double): Astronomical term for a place in space where matter is infinitely dense a singularity |
| #6372, aired 2012-05-08 | SCIENCE & NATURE $1200: (Sarah of the Clue Crew shows a video taken on the International Space Station demonstrating the experiment she describes.) The International Space Station is ideal for zero gravity experiments; here, a knitting needle rubbed with paper creates a magnetic field, drawing a drop of water into this astronomical type of path spiraling around it an orbit |
| #5963, aired 2010-07-14 | ASTRONOMICAL! $1200: (Kelly of the Clue Crew shows an astronomical animation on the monitor.) In January, the red star appears to be in front of a group of stars, while in July, it appears to be in front of a different group; the term for that apparent shift caused by change in the observer's position is this the parallax view |
| #5900, aired 2010-04-16 | CURTAINS $300 (Daily Double): The Thermaweave, which blocks light, is from a line of curtains named for this astronomical event an eclipse |
| #2824, aired 1996-12-05 | POT LUCK $600: The astronomical symbol for this planet is the same as the biological symbol for a female Venus |
| #1678, aired 1991-12-11 | THE PLANETS $200: The astronomical symbol for this planet is a trident Neptune |
