Pluto

Astronomy Science 56 of 56 appearances
Practice Astronomy

"Pluto" appearances by year

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All Astronomy clues by year

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# Clue Answer As Given Value Round Category Air Date Show
15 years before its official discovery, it was photographed in 1915 by Lowell Observatory, which didn't know what it was Pluto $1,200 DJ PLANETARY SCIENCE 2021-10-22 #8495
Features on this body include Tombaugh Regio & Sleipnir Fossa, named for a horse that carried Odin to the underworld Pluto FJ THE SOLAR SYSTEM 2018-10-16 #7842
Discovered in 1930, this body has an estimated diameter of only 1,473 miles Pluto $200 J ASTRONOMY 2018-02-20 #7702
In March 1930 its discovery was announced at Lowell Observatory in Arizona Pluto DD $4,000 DJ ASTRONOMY 2012-10-17 #6458
In 2005, 2 additional moons, Hydra & Nix, were discovered orbiting this dwarf planet Pluto $400 J ASTRONOMY 2012-03-02 #6325
The International Astronomical Union said in 2006 that this object was really part of the Kuiper Belt, not a true planet Pluto $200 J ASTRONOMY & ASTROLOGY 2010-05-04 #5912
In the time it takes this planet to orbit the sun once, you'd get over 90,000 deliveries of your daily paper Pluto $400 J THE PLANETS 2004-12-03 #4660
It's the only planet that has yet to be visited by a spacecraft Pluto $600 J THE PLANETS 2004-11-23 #4652
(Sarah of the Clue Crew stands outside the dome of the Adler Planetarium in Chicago.) The first modern planetarium in the Western Hemisphere, the Adler, opened in 1930, about the time of this planet's discovery Pluto $1,200 DJ THE ADLER PLANETARIUM 2004-10-11 #4621
The one named by an 11-year-old Pluto $800 J PLANETARY DISTINCTIONS 2004-10-05 #4617
Some scientists want to reclassify this planet as a wayward moon Pluto $600 J DID WE PLANET THAT WAY? 2004-07-02 #4580
Moving at 2.9 miles per second, this planet has the slowest orbital speed of any planet in our solar system Pluto DD $1,000 DJ THE SOLAR SYSTEM 2004-05-28 #4555
In 1905 Percival Lowell began a search for this planet, which was discovered in 1930, 14 years after his death Pluto DD $2,000 DJ ASTRONOMY 2004-05-03 #4536
In 1978 astronomer James Christy named its moon in honor of his wife Charlene Pluto FJ THE PLANETS 2003-12-10 #4433
It's actually too small to influence other planets' orbits, the theory that led to its discovery Pluto $400 J THE PLANETS 2003-04-14 #4296
This root precedes -crat to mean one who rules by virtue of wealth Pluto $2,000 DJ PLANET NAMES 2002-04-12 #4065
KX76, a Kuiper belt object discovered in 2001, is about half the size of this smallest planet Pluto $800 J THE OTHER PLANETS 2002-02-05 #4017
This planet was named in 1930 by an 11-year-old British girl, Venetia Burney, who won a "Name Planet X" contest Pluto $600 J THE PLANETS 2002-01-14 #4001
This planet has more in common with Triton, Neptune's largest moon, than it does with any of the other planets Pluto DD $800 DJ THE SOLAR SYSTEM 2000-10-03 #3697
A 25-year-long telescope search for it ended with its discovery in 1930 Pluto $300 J THE PLANETS 2000-04-04 #3597
On Nov. 13, 1999 a body circling HD 209458 became the first new planet to be photographed since this one Pluto FJ SPACE 2000-03-16 #3584
On February 11, 1999 it again became the farthest planet from the sun & will remain so for 248 years Pluto $200 DJ ASTRONOMY 1999-04-23 #3380
It's the only planet you can't see using ordinary binoculars; you need a telescope Pluto $400 DJ THE SOLAR SYSTEM 1999-02-17 #3333
Astronomer Clyde Tombaugh discovered this tiny planet in 1930 Pluto $500 J THE PLANETS 1997-04-10 #2914
This smallest planet always keeps the same face toward Charon, its moon Pluto $400 J THE PLANETS 1996-12-09 #2826
It's the only planet in our solar system discovered by an American, Clyde Tombaugh Pluto $500 J THE PLANETS 1996-10-01 #2777
The orbit of this smallest planet has the greatest eccentricity Pluto $600 DJ ASTRONOMY 1996-05-16 #2709
It was the last of the 9 planets discovered Pluto $300 J THE PLANETS 1996-02-21 #2648
It would take about 25 of this smallest planet to make up the mass of the second smallest, Mercury Pluto $300 J THE PLANETS 1995-06-26 #2506
Charon does not orbit this planet; they both orbit a point between them Pluto $800 DJ THE PLANETS 1995-06-22 #2504
This planet will be closer to the Sun than Neptune until March 15, 1999 Pluto $800 DJ ASTRONOMY 1995-05-09 #2472
It takes Charon 6.4 days to orbit this planet Pluto $1,000 DJ THE PLANETS 1994-09-29 #2314
In 1930 Clyde W. Tombaugh discerned this new planet among millions of star images in photographs Pluto $400 DJ ASTRONOMY 1993-09-28 #2082
This planet has made only about 1/4 of an orbit since it was discovered in 1930 Pluto $500 J ASTRONOMY 1993-06-14 #2036
It was located by 20th century scientists looking for Planet X Pluto $100 J THE PLANETS 1993-06-07 #2031
The diameter of this planet is estimated to be less than 2,000 miles Pluto $500 J ASTRONOMY 1993-05-12 #2013
Its orbit takes about 248 Earth years, the longest of any planet in the solar system Pluto $400 DJ THE PLANETS 1993-01-19 #1932
Even the Hubble Space Telescope can't reveal the surface features of this outer, smallest planet Pluto $400 DJ THE PLANETS 1992-09-10 #1839
It's the only planet in the solar system smaller than the Earth's moon Pluto $800 DJ THE PLANETS 1992-05-05 #1782
This planet's only known moon, Charon, was discovered by James W. Christy in 1978 Pluto DD $1,000 DJ THE PLANETS 1991-12-11 #1678
This planet is smaller than our moon Pluto $600 DJ THE SOLAR SYSTEM 1991-10-02 #1628
This 9th planet's one moon has an orbit period of 6.4 days Pluto $100 J ASTRONOMY 1991-06-19 #1583
Because it is smallest & lightest, some astronomers think it should be considered an asteroid Pluto $800 DJ THE PLANETS 1991-02-05 #1487
Some believe that this small planet was originally a satellite of Neptune Pluto $200 DJ THE PLANETS 1990-12-31 #1461
In 1930, Clyde Tombaugh discovered this planet from photographic plates taken two moths earlier Pluto $200 DJ ASTRONOMY 1990-09-18 #1387
This icy planet takes 248 years to complete an orbit of the sun Pluto $400 J THE PLANETS 1990-03-19 #1286
It's the planet astronomers know least about Pluto $300 J THE PLANETS 1989-01-16 #1011
In 1950 the 1st measurements of this planet were made with the 200 inch telescope on Mt. Palomar Pluto $600 DJ THE SOLAR SYSTEM 1988-09-23 #930
This small outer planet may be a low-density ice ball Pluto $300 J ASTRONOMY 1988-04-08 #840
Evangeline Adams' 1931 "Astrology for Everyone" has no mention of Earth's or this planet's effects Pluto $1,000 DJ ASTROLOGY 1988-02-23 #807
Recent studies show this planet has a moon that's more than half its size Pluto FJ THE SOLAR SYSTEM 1987-09-16 #693
It has the most eccentric orbit of the 9 major planets Pluto $1,000 DJ ASTRONOMY 1986-10-24 #490
As this planet's furthest point, it's over 4.5 billion miles from the Sun Pluto $800 DJ THE SOLAR SYSTEM 1986-04-04 #410
Its only known moon is appropriately named after the boatman Charon Pluto FJ THE PLANETS 1986-03-31 #406
Only for a 20-year period every 248 years is this planet closer to the Sun than Neptune Pluto $400 J THE PLANETS 1985-12-05 #324
Last planet discovered & last chance for gas in the solar system Pluto $200 J SPACE 1984-09-17 #6
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