#  Array 

 



Click the markers on the map below to learn more about each site in the Event Horizon Telescope array. Green icons mark current sites, purple icons mark future sites, and blue icons mark historic sites. Zoom in on Mauna Kea in Hawaii and Atacama Desert in Chile to see nearby sites in more detail.



 

 

  

 



 

 

 

 

 

SortEHT Array in 2017   ![SMT at night](/sites/g/files/omnuum3116/files/styles/hwp_1_1__360x360_scale/public/eht/files/smt_at_night_med.jpg?itok=PA0nA492) 

 



Submillimeter Telescope (SMT),

part of the [Arizona Radio Observatory (ARO)](http://aro.as.arizona.edu/)



   ![APEX](/sites/g/files/omnuum3116/files/styles/hwp_1_1__360x360_scale/public/eht/files/apex_night_small.jpg?itok=ZUSs4_Ik) 

 



[Atacama Pathfinder EXperiment (APEX)](http://www.apex-telescope.org/)

   ![IRAM](/sites/g/files/omnuum3116/files/styles/hwp_1_1__360x360_scale/public/eht/files/iram.jpg?itok=nwB-1Rtz) 

 



[IRAM 30-meter telescope](http://www.iram-institute.org/EN/30-meter-telescope.php?ContentID=2&rub=2&srub=0&ssrub=0&sssrub=0)

   ![JCMT](/sites/g/files/omnuum3116/files/styles/hwp_1_1__360x360_scale/public/eht/files/jcmt4.jpg?itok=q53caCXp) 

 



[James Clerk Maxwell Telescope (JCMT)](http://www.eaobservatory.org/jcmt/)

   ![LMT in sunset](/sites/g/files/omnuum3116/files/styles/hwp_1_1__360x360_scale/public/eht/files/LMT_new_sunset_2000x1333_INAOE.jpg?itok=8ww_LFN5) 

 



[Large Millimeter Telescope "Alfonso Serrano" (LMT)](http://www.lmtgtm.org/)

   ![SMA](/sites/g/files/omnuum3116/files/styles/hwp_1_1__360x360_scale/public/eht/files/sma_web.jpg?itok=m9nwXBrO) 

 



[Submillimeter Array (SMA)](http://www.cfa.harvard.edu/sma/)

   ![ALMA](/sites/g/files/omnuum3116/files/styles/hwp_1_1__360x360_scale/public/eht/files/alma_19antennas_b.jpg?itok=0Q5_DfbF) 

 



[Atacama Large Millimeter/Submillimeter Array (ALMA)](http://www.almaobservatory.org/)

   ![South Pole Telescope](/sites/g/files/omnuum3116/files/styles/hwp_1_1__360x360_scale/public/eht/files/spt_02.jpg?itok=TLlLBe2y) 

 



[South Pole Telescope (SPT)](http://pole.uchicago.edu/)





SortObservatories Joining the EHT Array in 2018-2020 ![Greenland Telescope](/sites/g/files/omnuum3116/files/GLT_Antenna-w.png)

 



[Greenland Telescope](https://www.cfa.harvard.edu/greenland12m/)

   ![IRAM NOEMA Observatory](/sites/g/files/omnuum3116/files/styles/hwp_1_1__360x360_scale/public/eht/files/iram_noema_aerial_001.jpg?itok=XbO_e0lx) 

 



[IRAM NOEMA Observatory](http://www.iram-institute.org/EN/noema-project.php?ContentID=9&rub=9&srub=0&ssrub=0&sssrub=0)

 ![KittPeakAerial25-750x500](/sites/g/files/omnuum3116/files/2024-10/KittPeakAerial25-750x500.jpg)

 



Kitt Peak 12-meter Telescope,

part of the [Arizona Radio Observatory (ARO)](http://aro.as.arizona.edu/)







SortHistoric Sites (Decomissioned Prior to 2017) ![CARMA Array](/sites/g/files/omnuum3116/files/carma_compact.jpg)

 



[Combined Array for Research in Millimeter-wave Astronomy (CARMA)](http://www.mmarray.org/)

 ![cso_small_0](/sites/g/files/omnuum3116/files/2024-10/cso_small_0.jpg)

 



[Caltech Submillimeter Observatory (CSO)](http://cso.caltech.edu)