<Table> Reflecting telescopes <Tr> <Th> Name </Th> <Th> Image </Th> <Th> Effective aperture m </Th> <Th> Aper . in </Th> <Th> Mirror type </Th> <Th> Nationality / Sponsors </Th> <Th> Site </Th> <Th> Built </Th> </Tr> <Tr> <Td> Gran Telescopio Canarias ( GTC ) </Td> <Td> </Td> <Td> 7001104000000000000 ♠ 10.4 m </Td> <Td> 409 '' </Td> <Td> Segmented , 36 </Td> <Td> Spain ( 90 % ) , Mexico , USA </Td> <Td> Roque de los Muchachos Obs. , Canary Islands , Spain </Td> <Td> 2006 / 9 </Td> </Tr> <Tr> <Td> Hobby - Eberly Telescope ( HET ) 11 m × 9.8 m mirror </Td> <Td> </Td> <Td> 7001100000000000000 ♠ 10 m </Td> <Td> 394 '' </Td> <Td> Segmented , 91 </Td> <Td> USA , Germany </Td> <Td> McDonald Observatory , Texas , USA </Td> <Td> 1997 </Td> </Tr> <Tr> <Td> Keck 1 </Td> <Td> </Td> <Td> 7001100000000000000 ♠ 10 m </Td> <Td> 394 '' </Td> <Td> Segmented , 36 </Td> <Td> USA </Td> <Td> Mauna Kea Observatories , Hawaii , USA </Td> <Td> </Td> </Tr> <Tr> <Td> Keck 2 </Td> <Td> </Td> <Td> 7001100000000000000 ♠ 10 m </Td> <Td> 394 '' </Td> <Td> Segmented , 36 </Td> <Td> USA </Td> <Td> Mauna Kea Observatories , Hawaii , USA </Td> <Td> </Td> </Tr> <Tr> <Td> Southern African Large Telescope ( SALT ) 11 m × 9.8 m mirror </Td> <Td> </Td> <Td> 7000920000000099999 ♠ 9.2 m </Td> <Td> 362 '' </Td> <Td> Segmented , 91 </Td> <Td> South Africa , USA , UK , Germany , Poland , New Zealand </Td> <Td> South African Astronomical Obs. , Northern Cape , South Africa </Td> <Td> 2005 </Td> </Tr> <Tr> <Td> Large Binocular Telescope ( LBT ) Phased - array optics for combined 11.9 m </Td> <Td> </Td> <Td> 7000840000000000000 ♠ 8.4 m × 2 </Td> <Td> 330 '' × 2 </Td> <Td> Multiple mirror , 2 </Td> <Td> USA , Italy , Germany </Td> <Td> Mount Graham International Observatory , Arizona , USA </Td> <Td> </Td> </Tr> <Tr> <Td> Subaru ( JNLT ) </Td> <Td> </Td> <Td> 7000820009999999999 ♠ 8.2 m </Td> <Td> 323 '' </Td> <Td> Single </Td> <Td> Japan </Td> <Td> Mauna Kea Observatories , Hawaii , USA </Td> <Td> 1999 </Td> </Tr> <Tr> <Td> VLT UT1 -- Antu </Td> <Td> </Td> <Td> 7000820009999999999 ♠ 8.2 m </Td> <Td> 323 '' </Td> <Td> Single </Td> <Td> ESO Countries , Chile </Td> <Td> Paranal Observatory , Antofagasta Region , Chile </Td> <Td> 1998 </Td> </Tr> <Tr> <Td> VLT UT2 -- Kueyen </Td> <Td> </Td> <Td> 7000820009999999999 ♠ 8.2 m </Td> <Td> 323 '' </Td> <Td> Single </Td> <Td> ESO Countries , Chile </Td> <Td> Paranal Observatory , Antofagasta Region , Chile </Td> <Td> 1999 </Td> </Tr> <Tr> <Td> VLT UT3 -- Melipal </Td> <Td> </Td> <Td> 7000820009999999999 ♠ 8.2 m </Td> <Td> 323 '' </Td> <Td> Single </Td> <Td> ESO Countries , Chile </Td> <Td> Paranal Observatory , Antofagasta Region , Chile </Td> <Td> 2000 </Td> </Tr> <Tr> <Td> VLT UT4 -- Yepun </Td> <Td> </Td> <Td> 7000820009999999999 ♠ 8.2 m </Td> <Td> 323 '' </Td> <Td> Single </Td> <Td> ESO Countries , Chile </Td> <Td> Paranal Observatory , Antofagasta Region , Chile </Td> <Td> 2001 </Td> </Tr> <Tr> <Td> Gemini North ( Gillett ) </Td> <Td> </Td> <Td> 7000810000000000000 ♠ 8.1 m </Td> <Td> 318 '' </Td> <Td> Single </Td> <Td> USA , UK , Canada , Chile , Australia , Argentina , Brazil </Td> <Td> Mauna Kea Observatories , Hawaii , USA </Td> <Td> 1999 </Td> </Tr> <Tr> <Td> Gemini South </Td> <Td> </Td> <Td> 7000810000000000000 ♠ 8.1 m </Td> <Td> 318 '' </Td> <Td> Single </Td> <Td> USA , UK , Canada , Chile , Australia , Argentina , Brazil </Td> <Td> Cerro Pachón ( CTIO ) , Coquimbo Region , Chile </Td> <Td> 2001 </Td> </Tr> <Tr> <Td> MMT ( 1 x 6.5 m ) </Td> <Td> </Td> <Td> 7000650000000000000 ♠ 6.5 m </Td> <Td> 256 '' </Td> <Td> Single </Td> <Td> USA </Td> <Td> F.L. Whipple Obs. , Arizona , USA </Td> <Td> 2000 </Td> </Tr> <Tr> <Td> Magellan 1 ( Walter Baade ) </Td> <Td> </Td> <Td> 7000650000000000000 ♠ 6.5 m </Td> <Td> 256 '' </Td> <Td> Honeycomb </Td> <Td> USA </Td> <Td> Las Campanas Obs. , Coquimbo Region , Chile </Td> <Td> 2000 </Td> </Tr> <Tr> <Td> Magellan 2 ( Landon Clay ) </Td> <Td> </Td> <Td> 7000650000000000000 ♠ 6.5 m </Td> <Td> 256 '' </Td> <Td> Honeycomb </Td> <Td> USA </Td> <Td> Las Campanas Obs. , Coquimbo Region , Chile </Td> <Td> 2002 </Td> </Tr> <Tr> <Td> BTA - 6 </Td> <Td> </Td> <Td> 7000600000000000000 ♠ 6 m </Td> <Td> 238 '' </Td> <Td> Single </Td> <Td> USSR / Russia </Td> <Td> Special Astrophysical Obs. , Karachay -- Cherkessia ,
<Table> Reflecting telescopes <Tr> <Th> Name </Th> <Th> Image </Th> <Th> Effective aperture m </Th> <Th> Aper . in </Th> <Th> Mirror type </Th> <Th> Nationality / Sponsors </Th> <Th> Site </Th> <Th> Built </Th> </Tr> <Tr> <Td> Gran Telescopio Canarias ( GTC ) </Td> <Td> </Td> <Td> 7001104000000000000 ♠ 10.4 m </Td> <Td> 409 '' </Td> <Td> Segmented , 36 </Td> <Td> Spain ( 90 % ) , Mexico , USA </Td> <Td> Roque de los Muchachos Obs. , Canary Islands , Spain </Td> <Td> 2006 / 9 </Td> </Tr> <Tr> <Td> Hobby - Eberly Telescope ( HET ) 11 m × 9.8 m mirror </Td> <Td> </Td> <Td> 7001100000000000000 ♠ 10 m </Td> <Td> 394 '' </Td> <Td> Segmented , 91 </Td> <Td> USA , Germany </Td> <Td> McDonald Observatory , Texas , USA </Td> <Td> 1997 </Td> </Tr> <Tr> <Td> Keck 1 </Td> <Td> </Td> <Td> 7001100000000000000 ♠ 10 m </Td> <Td> 394 '' </Td> <Td> Segmented , 36 </Td> <Td> USA </Td> <Td> Mauna Kea Observatories , Hawaii , USA </Td> <Td> </Td> </Tr> <Tr> <Td> Keck 2 </Td> <Td> </Td> <Td> 7001100000000000000 ♠ 10 m </Td> <Td> 394 '' </Td> <Td> Segmented , 36 </Td> <Td> USA </Td> <Td> Mauna Kea Observatories , Hawaii , USA </Td> <Td> </Td> </Tr> <Tr> <Td> Southern African Large Telescope ( SALT ) 11 m × 9.8 m mirror </Td> <Td> </Td> <Td> 7000920000000099999 ♠ 9.2 m </Td> <Td> 362 '' </Td> <Td> Segmented , 91 </Td> <Td> South Africa , USA , UK , Germany , Poland , New Zealand </Td> <Td> South African Astronomical Obs. , Northern Cape , South Africa </Td> <Td> 2005 </Td> </Tr> <Tr> <Td> Large Binocular Telescope ( LBT ) Phased - array optics for combined 11.9 m </Td> <Td> </Td> <Td> 7000840000000000000 ♠ 8.4 m × 2 </Td> <Td> 330 '' × 2 </Td> <Td> Multiple mirror , 2 </Td> <Td> USA , Italy , Germany </Td> <Td> Mount Graham International Observatory , Arizona , USA </Td> <Td> </Td> </Tr> <Tr> <Td> Subaru ( JNLT ) </Td> <Td> </Td> <Td> 7000820009999999999 ♠ 8.2 m </Td> <Td> 323 '' </Td> <Td> Single </Td> <Td> Japan </Td> <Td> Mauna Kea Observatories , Hawaii , USA </Td> <Td> 1999 </Td> </Tr> <Tr> <Td> VLT UT1 -- Antu </Td> <Td> </Td> <Td> 7000820009999999999 ♠ 8.2 m </Td> <Td> 323 '' </Td> <Td> Single </Td> <Td> ESO Countries , Chile </Td> <Td> Paranal Observatory , Antofagasta Region , Chile </Td> <Td> 1998 </Td> </Tr> <Tr> <Td> VLT UT2 -- Kueyen </Td> <Td> </Td> <Td> 7000820009999999999 ♠ 8.2 m </Td> <Td> 323 '' </Td> <Td> Single </Td> <Td> ESO Countries , Chile </Td> <Td> Paranal Observatory , Antofagasta Region , Chile </Td> <Td> 1999 </Td> </Tr> <Tr> <Td> VLT UT3 -- Melipal </Td> <Td> </Td> <Td> 7000820009999999999 ♠ 8.2 m </Td> <Td> 323 '' </Td> <Td> Single </Td> <Td> ESO Countries , Chile </Td> <Td> Paranal Observatory , Antofagasta Region , Chile </Td> <Td> 2000 </Td> </Tr> <Tr> <Td> VLT UT4 -- Yepun </Td> <Td> </Td> <Td> 7000820009999999999 ♠ 8.2 m </Td> <Td> 323 '' </Td> <Td> Single </Td> <Td> ESO Countries , Chile </Td> <Td> Paranal Observatory , Antofagasta Region , Chile </Td> <Td> 2001 </Td> </Tr> <Tr> <Td> Gemini North ( Gillett ) </Td> <Td> </Td> <Td> 7000810000000000000 ♠ 8.1 m </Td> <Td> 318 '' </Td> <Td> Single </Td> <Td> USA , UK , Canada , Chile , Australia , Argentina , Brazil </Td> <Td> Mauna Kea Observatories , Hawaii , USA </Td> <Td> 1999 </Td> </Tr> <Tr> <Td> Gemini South </Td> <Td> </Td> <Td> 7000810000000000000 ♠ 8.1 m </Td> <Td> 318 '' </Td> <Td> Single </Td> <Td> USA , UK , Canada , Chile , Australia , Argentina , Brazil </Td> <Td> Cerro Pachón ( CTIO ) , Coquimbo Region , Chile </Td> <Td> 2001 </Td> </Tr> <Tr> <Td> MMT ( 1 x 6.5 m ) </Td> <Td> </Td> <Td> 7000650000000000000 ♠ 6.5 m </Td> <Td> 256 '' </Td> <Td> Single </Td> <Td> USA </Td> <Td> F.L. Whipple Obs. , Arizona , USA </Td> <Td> 2000 </Td> </Tr> <Tr> <Td> Magellan 1 ( Walter Baade ) </Td> <Td> </Td> <Td> 7000650000000000000 ♠ 6.5 m </Td> <Td> 256 '' </Td> <Td> Honeycomb </Td> <Td> USA </Td> <Td> Las Campanas Obs. , Coquimbo Region , Chile </Td> <Td> 2000 </Td> </Tr> <Tr> <Td> Magellan 2 ( Landon Clay ) </Td> <Td> </Td> <Td> 7000650000000000000 ♠ 6.5 m </Td> <Td> 256 '' </Td> <Td> Honeycomb </Td> <Td> USA </Td> <Td> Las Campanas Obs. , Coquimbo Region , Chile </Td> <Td> 2002 </Td> </Tr> <Tr> <Td> BTA - 6 </Td> <Td> </Td> <Td> 7000600000000000000 ♠ 6 m </Td> <Td> 238 '' </Td> <Td> Single </Td> <Td> USSR / Russia </Td> <Td> Special Astrophysical Obs. , Karachay -- Cherkessia ,
where is the world 's largest optical telescope located
where is the world 's largest optical telescope located
Roque de los Muchachos Obs. , Canary Islands , Spain
Roque de los Muchachos Obs. , Canary Islands , Spain