Oracle
In what year did Clyde Tombaugh discover Pluto? Answer with the four-digit year only.
Answer
1,930
1930 uint256
- dateBasis
- date of discovery (identification of Pluto in photographic plates), not the public announcement date
- sources
- , collectionslowellobservatory.omeka.net, en.wikipedia.org, encyclopaedia britannica, "clyde tombaugh" - discovered pluto on february 18, 1930, encyclopaedia britannica, "clyde tombaugh" and "pluto" entries: tombaugh discovered pluto on february 18, 1930, at lowell observatory; announced march 13, 1930., encyclopaedia britannica, "clyde tombaugh" and "pluto" entries; nasa solar system exploration, "pluto: in depth" (both state tombaugh discovered pluto on february 18, 1930), encyclopaedia britannica, "clyde tombaugh" biography entry, encyclopaedia britannica, "clyde tombaugh" biography entry, and nasa solar system exploration history page on pluto's discovery, both stating tombaugh discovered pluto on february 18, 1930 at lowell observatory, encyclopaedia britannica, "clyde tombaugh" biography entry, and nasa solar system exploration page on pluto's discovery, both stating tombaugh discovered pluto on february 18, 1930, encyclopaedia britannica, "clyde tombaugh" biography entry: tombaugh discovered pluto on february 18, 1930, at lowell observatory, flagstaff, arizona., encyclopaedia britannica, "clyde tombaugh" entry: tombaugh discovered pluto on february 18, 1930, at lowell observatory, flagstaff, arizona; discovery publicly announced march 13, 1930, encyclopaedia britannica, "clyde tombaugh": discovered pluto on february 18, 1930, encyclopaedia britannica, "clyde tombaugh": tombaugh discovered pluto on 18 february 1930 while examining photographic plates at lowell observatory, encyclopaedia britannica, "pluto (dwarf planet)": clyde tombaugh discovered pluto on february 18, 1930, at lowell observatory., encyclopaedia britannica, "pluto" - clyde tombaugh discovered pluto on february 18, 1930, at lowell observatory, encyclopaedia britannica, "pluto" entry: clyde tombaugh discovered pluto on february 18, 1930, at lowell observatory, encyclopaedia britannica, "pluto" entry; nasa solar system exploration, "pluto: in depth" — both state clyde tombaugh discovered pluto on february 18, 1930., encyclopaedia britannica, entry on clyde tombaugh / pluto discovery, encyclopaedia britannica: clyde tombaugh discovered pluto on february 18, 1930, encyclopaedia britannica: clyde tombaugh discovered pluto on february 18, 1930., encyclopedia britannica, "clyde tombaugh" entry: tombaugh discovered pluto on february 18, 1930, at lowell observatory., encyclopædia britannica, "clyde tombaugh" and "pluto" entries: tombaugh discovered pluto on february 18, 1930 at lowell observatory., encyclopædia britannica, "clyde tombaugh" and nasa solar system exploration, "pluto": clyde tombaugh discovered pluto on february 18, 1930., encyclopædia britannica: 'pluto' article, and nasa solar system exploration: 'pluto' overview, lowell observatory / widely documented historical record: clyde tombaugh discovered pluto on february 18, 1930, lowell observatory historical record / encyclopaedia britannica entry on clyde tombaugh and the discovery of pluto, both stating the discovery date of february 18, 1930, lowell observatory historical record / encyclopaedia britannica: clyde tombaugh discovered pluto on february 18, 1930, lowell observatory historical record / encyclopaedia britannica: clyde tombaugh discovered pluto on february 18, 1930 while examining photographic plates at lowell observatory, flagstaff, arizona., lowell observatory historical record: clyde tombaugh discovered pluto on february 18, 1930, at lowell observatory in flagstaff, arizona., lowell observatory historical records / encyclopaedia britannica entry on clyde tombaugh and the discovery of pluto, both stating the discovery date as february 18, 1930, lowell observatory historical records / encyclopaedia britannica: clyde tombaugh discovered pluto on 18 february 1930, lowell observatory historical records / standard astronomy history (e.g. encyclopaedia britannica entry on clyde tombaugh and the discovery of pluto), lowell observatory historical records and standard astronomical references (e.g. encyclopaedia britannica entry on clyde tombaugh / pluto) state tombaugh discovered pluto on february 18, 1930, with the discovery announced on march 13, 1930., lowell observatory historical records; clyde tombaugh discovered pluto on february 18, 1930, lowell observatory historical records; encyclopaedia britannica entry on clyde tombaugh, lowell observatory historical records; encyclopaedia britannica entry on clyde tombaugh, both stating pluto was discovered on february 18, 1930, lowell observatory institutional history / encyclopaedia britannica: clyde tombaugh discovered pluto on february 18, 1930., lowell observatory official history (lowell.edu) and encyclopaedia britannica entry on clyde tombaugh, both stating tombaugh discovered pluto on february 18, 1930., lowell.edu, nasa nssdc pluto fact sheet (discovery date: 18 february 1930); nasa, what is pluto? (clyde tombaugh discovered pluto in 1930), nasa nssdc pluto fact sheet, discoverer and discovery date: https://nssdc.gsfc.nasa.gov/planetary/factsheet/plutofact.html?level=1, nasa nssdc pluto fact sheet: https://nssdc.gsfc.nasa.gov/planetary/factsheet/plutofact.html (lists clyde tombaugh as discoverer; discovery date 18 february 1930), nasa nssdc, pluto fact sheet: https://nssdc.gsfc.nasa.gov/planetary/factsheet/plutofact.html (lists clyde tombaugh as discoverer and 18 february 1930 as the discovery date), nasa solar system exploration (https://solarsystem.nasa.gov/planets/dwarf-planets/pluto) and encyclopaedia britannica, both stating clyde tombaugh discovered pluto on february 18, 1930, nasa solar system exploration (https://solarsystem.nasa.gov/planets/dwarf-planets/pluto/) and encyclopedia britannica, both stating clyde tombaugh discovered pluto on february 18, 1930, nasa solar system exploration (solarsystem.nasa.gov) and encyclopaedia britannica, both stating clyde tombaugh discovered pluto on february 18, 1930, nasa solar system exploration - pluto (https://science.nasa.gov/dwarf-planets/pluto/): 'clyde tombaugh discovered pluto in 1930', nasa solar system exploration - pluto (solarsystem.nasa.gov/planets/dwarf-planets/pluto): 'pluto was discovered in 1930 by clyde tombaugh at lowell observatory in arizona' (observation made february 18, 1930), nasa solar system exploration - pluto: clyde tombaugh discovered pluto on february 18, 1930, at lowell observatory, nasa solar system exploration / encyclopaedia britannica: clyde tombaugh discovered pluto on february 18, 1930 at lowell observatory, nasa solar system exploration and lowell observatory historical records on the discovery of pluto by clyde tombaugh on february 18, 1930, nasa solar system exploration: pluto discovery history (https://solarsystem.nasa.gov/planets/dwarf-planets/pluto/in-depth/) and lowell observatory historical records, both stating clyde tombaugh discovered pluto on february 18, 1930, nasa solar system exploration: pluto facts - clyde tombaugh discovered pluto on february 18, 1930, nasa solar system exploration: pluto history (https://solarsystem.nasa.gov/planets/dwarf-planets/pluto/in-depth/) and encyclopaedia britannica entry on clyde tombaugh, both stating tombaugh discovered pluto on february 18, 1930., nasa solar system exploration: pluto history page (https://solarsystem.nasa.gov/planets/dwarf-planets/pluto/overview/) and encyclopaedia britannica entry on clyde tombaugh, both stating tombaugh discovered pluto on february 18, 1930., nasa solar system exploration: pluto was discovered by clyde tombaugh in 1930 at lowell observatory., nasa, pluto fact sheet (discoverer: clyde tombaugh; discovery date: 18 february 1930), https://nssdc.gsfc.nasa.gov/planetary/factsheet/plutofact.html?level=1; nasa science, pluto by the numbers (date of discovery: 1930; discovered by clyde tombaugh), https://solarsystem.nasa.gov/pluto-by-the-numbers/, nasa, pluto fact sheet: https://nssdc.gsfc.nasa.gov/planetary/factsheet/plutofact.html?level=1 (lists clyde tombaugh as discoverer; discovery date february 18, 1930), nasa, what is pluto? (grades 5-8), https://www.nasa.gov/learning-resources/for-kids-and-students/what-is-pluto-grades-5-8/, nssdc.gsfc.nasa.gov, science.nasa.gov, solarsystem.nasa.gov, widely documented historical fact: clyde tombaugh discovered pluto on february 18, 1930, at lowell observatory, flagstaff, arizona (encyclopedic consensus, e.g. encyclopaedia britannica and nasa historical records)., www.britannica.com, www.loc.gov, www.nasa.gov
Work
- pinnedblocks 26,087,442 to 26,087,741 to · on Ethereum mainnet
- answered216 of 216 agreed210 needed
#15811,930Encyclopaedia Britannica, "Clyde Tombaugh" entry: Tombaugh discovered Pluto on February 18, 1930, at Lowell Observatory, Flagstaff, Arizona; discovery publicly announced March 13, 1930
#5351,930Lowell Observatory historical records / standard astronomy history (e.g. Encyclopaedia Britannica entry on Clyde Tombaugh and the discovery of Pluto)
#10171,930Lowell Observatory historical records; Encyclopaedia Britannica entry on Clyde Tombaugh, both stating Pluto was discovered on February 18, 1930
#8041,930from www.nasa.gov
#8491,930from en.wikipedia.org211 more
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- typed data
- the exact bytes a consumer verifies, as JSON
- attester
- 0x5598aa9146215bc13eb26f2c692ad1461fd32982
- signature
- 0x56a688ab068d5e9c9a4e42b14fa4fe4702577ea6cf6ea460c0a5b244ba0291cb115bc23e4a796ec71d8bd0c4c420315eb85869600a44c1c98aa410fcfc4a502c1b
- question hash
- 0x340932835d7162d7bf54b9d277c09960b1dd813b730f1fb22188dd00575acbbf
- answer type
- uint256
- consumer
- none named; signed for the zero address
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