100-inch Hooker telescope

E553793

The 100-inch Hooker telescope is a historic reflecting telescope at Mount Wilson Observatory, famous for Edwin Hubble’s observations that revealed the expanding universe and established galaxies beyond the Milky Way.

All labels observed (2)

Label Occurrences
Hooker Telescope 3
100-inch Hooker telescope canonical 1

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Statements (49)

Predicate Object
instanceOf astronomical observatory instrument
historical scientific instrument
reflecting telescope
associatedWithDiscovery cosmological expansion (Hubble–Lemaître law)
galaxies beyond the Milky Way
completedIn 1917
constructionStarted 1908
eraOfMajorUse early 20th century
firstLight 1917
fundedBy Carnegie Institution of Washington
John Daggett Hooker
hasAperture 100 inches
2.5 meters
hasCoordinateSystem equatorial coordinate system
hasDome Mount Wilson 100-inch dome
hasFocalLength approximately 15 meters
heritageDesignation National Historic Landmark (as part of Mount Wilson Observatory site)
locatedIn Los Angeles County, California
linked to: Los Angeles County

Mount Wilson Observatory
Mount Wilson, California
San Gabriel Mountains
United States
mountType equatorial mount
namedAfter John Daggett Hooker
notableFor evidence that spiral nebulae are external galaxies
measurements of Cepheid variable stars in spiral nebulae
observations leading to discovery of the expanding universe
observations of galaxies beyond the Milky Way
operatedBy Carnegie Institution for Science
Mount Wilson Observatory
opticalDesign classical Cassegrain
primaryMirrorDiameter 100 inches
primaryMirrorMaterial glass
replacedAsLargestBy 200-inch Hale telescope
linked to: Hale Telescope
status historical research telescope
partially retired from frontline research
telescopeType Cassegrain reflector
usedBy Edwin Hubble
George Ellery Hale
Milton Humason
Walter Baade
usedFor cosmology
extragalactic astronomy
photography
spectroscopy
stellar astronomy
usedInPublication Edwin Hubble’s 1923–1924 papers on Cepheids in Andromeda
Edwin Hubble’s 1929 paper on the relation between distance and radial velocity among extra-galactic nebulae
wasLargestTelescopeInWorld 1917–1949

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Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

Mount Wilson Observatory hasTelescope 100-inch Hooker telescope
John D. Hooker supportedProject Hooker Telescope
linked to: 100-inch Hooker telescope
John D. Hooker associatedWith Hooker Telescope
linked to: 100-inch Hooker telescope
Hubble usedInstrument Hooker Telescope
linked to: 100-inch Hooker telescope