| #21, aired 2024-05-01 | NOT YOUR EVERYDAY WORDS $1600: This odd word from astronomy also means a combination of 2 feet in one meter in poetry syzygy |
| #9007, aired 2024-01-02 | LET'S TALK ASTRONOMY $4,800 (Daily Double): When 2 celestial bodies appear close together, they're "in" this, also a part of speech conjunction |
| #8990, aired 2023-12-08 | A MUSE ME $400: Look! up in the sky! It's a bird! It's a plane! No, it's Urania, muse of this science! astronomy |
| #8814, aired 2023-02-23 | ASTRONOMY & SPACE $800: There are about 6 trillion miles in one of these units of space distance a light-year |
| #8800, aired 2023-02-03 | A LITTLE ASTRONOMY $400: Caused by Jupiter's gravity, the Kirkwood gaps are nearly empty areas in the solar system's belt of these the asteroid belt |
| #8661, aired 2022-06-13 | ASTRONOMY $800: 65 times the size of the Sun, Canopus, the second-brightest star in the sky, is a yellow-white one of these giant |
| #8634, aired 2022-05-05 | ASTRONOMY $1200: In 2019 Green Bank Observatory found the most massive of this superdense type of star (a teaspoon weighs more than all of humanity) a neutron star |
| #8634, aired 2022-05-05 | ASTRONOMY $2000: This comet with a hyphenated name was broken up by the gravity of Jupiter & fragments of it crashed into the planet in 1994 Shoemaker-Levy 9 |
| #8619, aired 2022-04-14 | GREAT NAMES OF SCIENCE $2000: America's first professional female astronomer, in 1847, she discovered a new comet, & later became Vassar's first professor of astronomy Maria Mitchell |
| #8229, aired 2020-06-04 | THROWING YOU A CURVE $800: In astronomy, a light curve graphs changes in magnitude of one of these, especially the variable type a star |
| #7925, aired 2019-02-08 | STARGAZERS $800: In 1705 he published "A Synopsis of the Astronomy of Comets" describing the orbits of 24 comets that had been observed (Edmond) Halley |
| #7836, aired 2018-10-08 | ASTRONOMY $800: The first close-up images sent back to Earth from another planet were from a Russian probe on this planet in 1975 Venus |
| #7702, aired 2018-02-20 | ASTRONOMY $1000: (Sarah of the Clue Crew shows a model of Mars on the monitor.) Mars may have an accessory in 40 million years, as its gravity could break apart this inner & larger moon, whose debris would swirl around the planet & form a ring Phobos |
| #7560, aired 2017-06-23 | ASTRONOMY $1200: A new dwarf planet, 2015 RR245, has been discovered beyond the orbit of this planet, the 4th-largest in diameter Neptune |
| #7382, aired 2016-10-18 | A DISCOURAGING WORD $2000: Negative altitude in astronomy, or a period of economic woe depression |
| #6929, aired 2014-10-30 | ASTRONOMY $400: (Sarah of the Clue Crew shows a photograph on the monitor.) Photographer Thierry Legault traveled to Oman to get a photo of a partial solar eclipse; an added bonus was capturing this craft in the image the International Space Station |
| #6929, aired 2014-10-30 | ASTRONOMY $1200: Asteroid 1998 QE2, which buzzed by the Earth in 2013, surprised scientists who discovered it had one of these in tow a moon |
| #6797, aired 2014-03-18 | THE "BLACK"LIST $800: In astronomy a singularity is the center of one of these objects a black hole |
| #6753, aired 2014-01-15 | ASTRONOMY $1200: In 2010 Japan's Hayabusa spacecraft brought back dust samples from Itokawa, one of these objects an asteroid |
| #6753, aired 2014-01-15 | ASTRONOMY $2000: The comet discovered by Alan Hale & this Arizona astronomer in 1995 was visible to the naked eye for a record 19 months (Thomas) Bopp |
| #6727, aired 2013-12-10 | SCIENTIFIC EUROPEAN $400: In 1705 he published "A Synopsis of the Astronomy of Comets", detailing 24 that had been observed from 1337 to 1698 (Edmond) Halley |
| #6672, aired 2013-09-24 | ASTRONOMY $800: In November 2014 a spacecraft named Rosetta is scheduled to orbit the nucleus of 67P, one of these a comet |
| #6504, aired 2012-12-20 | OLD McDONALD HAD... $1600: William McDonald had a love for astronomy & left money to found this type of institution named for him in Texas observatory |
| #6458, aired 2012-10-17 | ASTRONOMY $1200: The magnitude of Algol, a binary star, changes every 69 hours as the fainter star does this, passes in front of its pal eclipses |
| #6458, aired 2012-10-17 | ASTRONOMY $2000: (Jimmy of the Clue Crew shows an astronomical animation on the monitor.) Also a term for a part of speech, it's when the Earth, a heavenly body like Venus, & the Sun are all nearly in a straight line conjunction |
| #6101, aired 2011-03-07 | ASTRONOMY $400: Though bright in the night sky, it has a clouded surface, so the image here was made of a mosaic of radar images Venus |
| #5912, aired 2010-05-04 | ASTRONOMY & ASTROLOGY $200: The International Astronomical Union said in 2006 that this object was really part of the Kuiper Belt, not a true planet Pluto |
| #5912, aired 2010-05-04 | ASTRONOMY & ASTROLOGY $1000: Your zodiac sign, as in "Hey baby, what's your sign?" is also called your this heavenly body sign a sun sign |
| #5612, aired 2009-01-20 | ASTRONOMY $800: This heavenly body shares its name with a liquid, & in 2007 scientists discovered that it has a liquid core Mercury |
| #5612, aired 2009-01-20 | ASTRONOMY $1200: (Hi, I'm astrophysicist Neil deGrasse Tyson.) The entire universe acts in many ways like a gas in a laboratory, so we conclude that as the universe expands, this will drop continuously as it approaches absolute zero temperature |
| #5442, aired 2008-04-15 | ASTRONOMY $3,000 (Daily Double): This moon that orbits Uranus in 18 hrs. was named for a Shakespeare character who can circle the Earth in 40 min. Puck |
| #5351, aired 2007-12-10 | CIRCUS SCIENCE $1200: (Jimmy of the Clue Crew watches a juggler pracice with clubs at Circus Center in San Francisco, CA.) It's time to throw the next club when the previous club reaches this point, also an astronomy term for the greatest distance from Earth apogee |
| #5342, aired 2007-11-27 | ASTRONOMY $2,000 (Daily Double): In mid-November, you can have a "roaring" good time watching this meteor shower the Leonids |
| #5341, aired 2007-11-26 | YOU PICKED A FINE TIME $2000: This longest division of geologic time doesn't have a fixed period; in astronomy, it's one billion years an eon |
| #5338, aired 2007-11-21 | ASTRONOMY $1200: This solid center of a comet is usually around 10 miles or less in diameter & consists of ice & dust particles the nucleus (or core) |
| #5237, aired 2007-05-22 | SIGNS & SYMBOLS $1200: (Cheryl of the Clue Crew gives the clue.) A symbol that is familiar from its use in biology is also used in astronomy to represent this planet Venus |
| #5183, aired 2007-03-07 | THE GREEK ALPHABET $400: In astronomy, this letter typically designates the brightest star in a constellation alpha |
| #4795, aired 2005-06-10 | 10-, 11- & 12-LETTER WORDS $600: (Cheryl of the Clue Crew reports from Chicago's Adler Astronomy Museum.) Built in 1913, the Atwood Sphere is an early one of these, which created a night sky using points of light instead of a projector a planetarium |
| #4767, aired 2005-05-03 | THE "METH"OD $1000: In mythology, the husband of Pandora & brother of Prometheus; in astronomy, a moon of Saturn Epimetheus |
| #4718, aired 2005-02-23 | ASTRONOMY $1000: (Sarah of the Clue Crew reports from beside a replica rover at the Adler Planetarium in Chicago, IL.) This is a replica of both the Mars exploration rover Spirit & this companion, who came knocking in January 2004 Opportunity |
| #4600, aired 2004-09-10 | ASTRONOMY $400: In 1672 Giovanni Cassini determined the distance from the Earth to this, creating a new measuring unit, the Au the sun |
| #4600, aired 2004-09-10 | ASTRONOMY $2000: A large crater on Saturn’s moon Mimas is named for the British astronomer who discovered the moon in 1789 William Herschel |
| #4536, aired 2004-05-03 | ASTRONOMY $400: A galactic cluster known as the Pleiades is in this constellation known as "The Bull" Taurus |
| #4536, aired 2004-05-03 | ASTRONOMY $2,000 (Daily Double): In 1905 Percival Lowell began a search for this planet, which was discovered in 1930, 14 years after his death Pluto |
| #4416, aired 2003-11-17 | ASTRONOMY & SPACE $200: First seen in 1995, Hale-Bopp, a famous one of these, should be back in another 2-3,000 years a comet |
| #4416, aired 2003-11-17 | ASTRONOMY & SPACE $600: The Crab Nebula is the remnants of a "super" one of these, observed & recorded in 1054 a nova |
| #4327, aired 2003-05-27 | ASTRONOMY'S GREATEST HITS $200: In 1995, 2 Swiss astronomers announced the first known one of these to orbit a star other than the sun planet |
| #4279, aired 2003-03-20 | EDUCATION $800: In 1971 he became professor of astronomy & space sciences at Cornell, a post he retained until his death in 1996 (Carl) Sagan |
| #4257, aired 2003-02-18 | A MUSE ME $400: Look! Up in the sky! It's a bird! It's a plane! No, it's Urania, muse of this science! astronomy |
| #4111, aired 2002-06-17 | SPACED OUT $400: For a great view of Mars, astronomy.com suggests using a Wratten no. 25 filter in this appropriate color red |
| #3860, aired 2001-05-18 | ASTRONOMY $500: In 1986 astronomers found a massive one of these at the center of the Milky Way galaxy Black hole |
| #3672, aired 2000-07-18 | SCIENTISTS $200: In 1705 he published "A Synopsis of the Astronomy of Comets" Edmond Halley |
| #3530, aired 1999-12-31 | ASTRONOMY $300: In 1994 fragments of Shoemaker-Levy 9 struck this planet, creating a plume over 1,000 miles high Jupiter |
| #3453, aired 1999-09-15 | ASTRONOMY $200: A camera orbiting this planet in March 1999 snapped a crater that resembles a "happy face" Mars |
| #3453, aired 1999-09-15 | ASTRONOMY $400: Sky and Telescope magazine erred 53 years ago; it's the fourth full moon in a season, not the second in a month Blue moon |
| #3380, aired 1999-04-23 | ASTRONOMY $800: In 1937 in Wheaton, Illinois, Grote Reber built the first one of these telescopes using a parabolic dish a radio telescope |
| #3355, aired 1999-03-19 | FROM A TO Y $800: Info on the aurora australis & eclipses are included in this section of the World Almanac astronomy |
| #3278, aired 1998-12-02 | HISTORIC NAMES $600: This Dane was a law student in 1560 when a solar eclipse sparked his interest in astronomy Tycho Brahe |
| #3180, aired 1998-05-29 | AT GREAT LENGTHS $1,000 (Daily Double): This distance used in astronomy is abbreviated pc & is equal to 19.2 trillion miles a parsec |
| #3149, aired 1998-04-16 | ASTRONOMY $200: The Crab Nebula, first observed in 1054 A.D., can be found in this constellation, & that's no bull Taurus |
| #3067, aired 1997-12-23 | ASTRONOMY $400: Most of these minor planets revolve around the sun in a "belt" between the orbits of Mars & Jupiter asteroids |
| #2904, aired 1997-03-27 | ASTRONOMY $800: One of these discovered by Giovanni Donati in 1858 has a tail about 45 million miles long Comet |
| #2904, aired 1997-03-27 | ASTRONOMY $1000: Deneb, a star of the first magnitude, marks the tail of the swan in this constellation Cygnus |
| #2886, aired 1997-03-03 | ASTRONOMY $800: A line drawn from Merak to Dubhe in this constellation points to Polaris, the North Star Ursa Major |
| #2870, aired 1997-02-07 | ASTRONOMY & SPACE $400: British scientists announced that they had found organic material in a second meteorite from this planet Mars |
| #2870, aired 1997-02-07 | ASTRONOMY & SPACE $600: In 1996 the sun went an exceptional 36 days without a visible one of these dark patches Sunspots |
| #2861, aired 1997-01-27 | ASTRONOMY $800: In 1572 this Danish astronomer discovered a supernova in the constellation Cassiopeia Tycho Brahe |
| #2816, aired 1996-11-25 | ASTRONOMY $600: This famous nebula is the remnant of a supernova observed in 1054 the Crab Nebula |
| #2816, aired 1996-11-25 | ASTRONOMY $800: This is defined as the position in a satellite's orbit when it's most distant from the Earth apogee |
| #2739, aired 1996-06-27 | SCIENCE $1000: In astronomy one of these bodies has a singularity at its center & an event horizon at its edge black hole |
| #2722, aired 1996-06-04 | ASTRONOMY $100: In 1796 Pierre Simon de Laplace suggested the existence of these objects from which light can't escape a black hole |
| #2722, aired 1996-06-04 | ASTRONOMY $300: In 1989 Asclepius, one of these, passed within 500,000 miles of the Earth an asteroid |
| #2722, aired 1996-06-04 | ASTRONOMY $400: In 1968 he became a professor of astronomy at Cornell & Director of the Laboratory for Planetary Studies Carl Sagan |
| #2709, aired 1996-05-16 | ASTRONOMY $400: In 1950 Jan Oort proposed that these tailed bodies come from a cloud about 1 light year from the Sun comets |
| #2625, aired 1996-01-19 | ASTRONOMY $400: Betelgeuse is a red supergiant in this constellation of the hunter Orion |
| #2606, aired 1995-12-25 | ASTRONOMY $400: First described in 1836, Baily's beads is a short-lived phenomenon seen during one of these a solar eclipse |
| #2588, aired 1995-11-29 | ASTRONOMY $500: In 1987 astronomers got their best look at one of these exploding stars in almost 400 years a supernova |
| #2522, aired 1995-07-18 | ASTRONOMY $500: Taking place in August, it's been called the most spectacular of the meteor showers a Perseid shower |
| #2522, aired 1995-07-18 | ASTRONOMY $900 (Daily Double): Titan, a moon of this planet, is the second-largest satellite in the solar system Saturn |
| #2439, aired 1995-03-23 | ASTRONOMY $400: The moon nearest a planet in our solar system is Phobos, 5,800 miles away from this planet Mars |
| #2439, aired 1995-03-23 | ASTRONOMY $800: For a solar eclipse to occur, the Moon must be in this phase new |
| #2434, aired 1995-03-16 | SCIENCE $1000: In astronomy, this unit of distance is equal to 3.26 light-years a parsec |
| #2415, aired 1995-02-17 | ASTRONOMY & SPACE $500: In a national contest, students chose the name of this space shuttle that replaced the Challenger Endeavour |
| #2383, aired 1995-01-04 | ASTRONOMY $400: In this phase of the Moon, its illuminated side is invisible to observers on Earth a new moon |
| #2243, aired 1994-05-11 | ASTRONOMY $1000: The one found in the center of the Crab Nebula flashes about 30 times each second a pulsar |
| #2229, aired 1994-04-21 | ASTRONOMY $400: A mnemonic for this is "My very educated mother just sent us nine pizzas" the names of the planets in order from the Sun |
| #2209, aired 1994-03-24 | BRITISH POTPOURRI $600: He was a professor of astronomy at Oxford when he designed its Sheldonian Theatre in the 1660s Christopher Wren |
| #2207, aired 1994-03-22 | ASTRONOMY & SPACE $100: Most of the meteors in a meteor shower are debris left behind by one of these tailed bodies a comet |
| #2207, aired 1994-03-22 | ASTRONOMY & SPACE $500: In 1992 cosmonaut Sergei Krikalev returned home after nearly a year aboard this space station Mir |
| #2036, aired 1993-06-14 | ASTRONOMY $100: This second Greek letter is used to designate the second-brightest star in a constellation beta |
| #2036, aired 1993-06-14 | ASTRONOMY $400: This cosmological theory says that all matter & radiation began in an explosion at a finite time in the past the Big Bang |
| #1886, aired 1992-11-16 | ASTRONOMY $200: In a 1908 book, Percival Lowell proposed that the markings on this planet were irrigation canals Mars |
| #1886, aired 1992-11-16 | ASTRONOMY $600: The Crab Nebula was formed by one of these massive exploding stars in 1054 a supernova |
| #1886, aired 1992-11-16 | ASTRONOMY $1000: A large amount of methane in this 7th planet's atmosphere causes it to appear bluish-green Uranus |
| #1871, aired 1992-10-26 | HOBBIES $200: Carl Sagan & his "Cosmos" series were credited with creating a renewed interest in this hobby astronomy |
| #1863, aired 1992-10-14 | ASTRONOMY $600: Perihelion refers to the point in the orbit of a planet that' nearest to this body the sun |
| #1723, aired 1992-02-12 | SCIENTISTS $200: In 1705's "A Synopsis of the Astronomy of Comets", this man described the orbits of 24 of them Edmond Halley |
| #1686, aired 1991-12-23 | ASTRONOMY $600: Saturn's Cassini division is a division in these the rings |
| #1686, aired 1991-12-23 | ASTRONOMY $1000: In 1565 this Danish astronomer had part of his nose sliced off in a duel Tycho Brahe |
| #1679, aired 1991-12-12 | "A" IN ASTRONOMY $100: 1 of the first 2 men to pick up rocks on the moon Neil Armstrong (or Edwin Aldrin) |
| #1679, aired 1991-12-12 | "A" IN ASTRONOMY $200: Also called "minor planets", thousands of these circle the sun asteroids |
| #1679, aired 1991-12-12 | "A" IN ASTRONOMY $300: In the sky & on the astrological chart, it lies between Taurus & Pisces Aries |
| #1679, aired 1991-12-12 | "A" IN ASTRONOMY $400: You must "strain" to see this galaxy, the most distant object visible to the naked eye the Andromeda Galaxy |
| #1679, aired 1991-12-12 | "A" IN ASTRONOMY $500: This triple star includes the closest star to the sun Alpha Centauri |
| #1673, aired 1991-12-04 | ASTRONOMY $200: In 1719 this planet was so bright that some people mistook it for a red comet Mars |
| #1673, aired 1991-12-04 | ASTRONOMY $400: Zubenelgenubi, a star in this constellation, tips the scales at an apparent magnitude of 2.9 Libra |
| #1583, aired 1991-06-19 | ASTRONOMY $400: The largest of these telescopes is the one in Puerto Rico that has a 1,000-foot diameter dish radio telescopes |
| #1579, aired 1991-06-13 | ASTRONOMY $1000: Titan, the largest moon in the solar system, orbits this planet in a little under 16 days Saturn |
| #1453, aired 1990-12-19 | ASTRONOMY $200: Greek letter usually used to designate the second brightest star in a constellation beta |
| #1383, aired 1990-09-12 | PHYSICAL SCIENCE $1000: In astronomy a body moving in the opposite direction from other members of a solar system is in this retrograde |
| #1370, aired 1990-07-13 | SIGNS & SYMBOLS $200: In astronomy a darkened circle indicates the moon is in this phase New Moon |
| #1346, aired 1990-06-11 | COMPOSERS $400: William Herschel, who is famous in this field of science, also did a little composing astronomy |
| #1254, aired 1990-02-01 | SCIENCE $1000: Abbreviated "pc", it's a unit of distance used in astronomy equal to 3.21 light years Parsec |
| #1166, aired 1989-10-02 | ASTRONOMY $1000: Before completing a 40" telescope in 1897, he was raising money for a 60" one, then a 100"... George Hale |
| #1121, aired 1989-06-19 | ASTRONOMY $500: The crab nebula is the remnant of one of these witnessed by Chinese astronomers in 1054 supernova |
| #902, aired 1988-07-05 | ASTRONOMY $600: It was founded in 1904 by George Ellery Hale in the mountains above Pasadena, Calif. the Mount Wilson Observatory |
| #902, aired 1988-07-05 | ASTRONOMY $800: A red giant star has exhausted all of this element used as fuel in its core hydrogen |
| #902, aired 1988-07-05 | ASTRONOMY $5,000 (Daily Double): Among planets in our solar system whose size is known, these 2 are closest in diameter Venus & the Earth |
| #852, aired 1988-04-26 | ENDS WITH "A" $200: In astronomy her name refers to a constellation and in the movie to a strain of virus Andromeda |
| #781, aired 1988-01-18 | ASTRONOMY $200: The tail of a comet always points in this direction in relation to the Sun away from the Sun |
| #761, aired 1987-12-21 | ASTRONOMY $500: About 14,000 years ago & again in A.D. 14000, the star Vega, not Polaris, will be this the North Star |
| #703, aired 1987-09-30 | SCIENCE $400: Using a telescope he made himself, he invented telescope astronomy in 1609 Galileo |
| #689, aired 1987-09-10 | ASTRONOMY $200: In the northern hemisphere, this season begins when the Sun "crosses the equator" from south to north spring |
| #423, aired 1986-04-23 | ASTRONOMY $400: This planet is only about ¾ as dense as water, so it probably wouldn’t leave “rings” in the bathtub Saturn |
| #400, aired 1986-03-21 | ASTRONOMY $400: Phase in which the Moon must be for a lunar eclipse to occur a Full Moon |
| #340, aired 1985-12-27 | ASTRONOMY $1000: A solar eclipse can only take place when the moon is in this phase new |
| #270, aired 1985-09-20 | ASTRONOMY $600: His book "Sidereus Nuncius" on telescope use was a best seller of 1610 Galileo |
| #168, aired 1985-05-01 | ASTRONOMY $100: The Sun, plus all the celestial bodies revolving around it a Solar System |
| #153, aired 1985-04-10 | ASTRONOMY $1000: Mentioned 3 times in the Bible, this constellation is named for a legendary Greek hunter Orion |
| #105, aired 1985-02-01 | ASTRONOMY $400: Noticed for 100 years, but thought to be a star, this 7th planet was discovered in 1781 Uranus |
| #105, aired 1985-02-01 | ASTRONOMY $800: Word meaning "mist", it comes in shapes like crab, veil and ring nebula |
| #90, aired 1985-01-11 | MUSICAL ASTRONOMY $300: In 1983 it happened to the sun & Bonnie Tyler's heart a total eclipse |
| #59, aired 1984-11-29 | ASTRONOMY $100 (Daily Double): To nearest ½ day, time it takes Moon to orbit Earth 29 and a half |
| #41, aired 1984-11-05 | ASTRONOMY $1,000 (Daily Double): Star followed in this song of escape from slavery:
"Follow the drinkin' gourd / Follow the drinkin' gourd / For the old man is a-waiting..." the North Star (Polaris) |
