Atacama Large Millimiter/submillimeter Array | ALMA

ALMA Shows Massive Young Stars Forming in “Chaotic Mess”

Press Releases

ALMA Shows Massive Young Stars Forming in “Chaotic Mess”

ALMA Discovers Rotating Infant Galaxy with Help of Natural Cosmic Telescope

ALMA Discovers Rotating Infant Galaxy with Help of Natural Cosmic Telescope

Record-breaking Stellar Flare from Nearby Star Recorded in Multiple Wavelengths for the First Time

Record-breaking Stellar Flare from Nearby Star Recorded in Multiple Wavelengths for the First Time

COVID-19 (coronavirus) Measures at ALMA

COVID-19 (coronavirus) Measures at ALMA

ALMA – In Search of our Cosmic Origins

ALMA – In Search of our Cosmic Origins

Telescopes Unite in Unprecedented Observations of Famous Black Hole

Telescopes Unite in Unprecedented Observations of Famous Black Hole

Five Amazing Things About Black Holes

Five Amazing Things About Black Holes

First interstellar comet may be the most pristine ever found

First interstellar comet may be the most pristine ever found

Stellar Eggs near Galactic Center Hatching into Baby Stars

Stellar Eggs near Galactic Center Hatching into Baby Stars

Astronomers image magnetic fields at the edge of M87’s black hole

Astronomers image magnetic fields at the edge of M87’s black hole

Powerful stratospheric winds measured on Jupiter for the first time

Powerful stratospheric winds measured on Jupiter for the first time

ALMA Cycle 8 2021 Call for Proposals is Now Open

ALMA Cycle 8 2021 Call for Proposals is Now Open

ALMA Soon to Resume Science Observations

ALMA Soon to Resume Science Observations

Quasar Discovery Sets New Distance Record

Quasar Discovery Sets New Distance Record

ALMA captures distant colliding galaxy dying out as it loses the ability to form stars

ALMA captures distant colliding galaxy dying out as it loses the ability to form stars

ALMA Expects to Resume Scientific Observations in 2021

ALMA Expects to Resume Scientific Observations in 2021

Newly processed Venus ALMA data made available to the community

Newly processed Venus ALMA data made available to the community

Chilean and Swiss artists selected for the 2nd edition of the Symmetry residency program

Chilean and Swiss artists selected for the 2nd edition of the Symmetry residency program

ALMA prepares for the 2020 Eclipse in Araucanía

ALMA prepares for the 2020 Eclipse in Araucanía

Galaxies in the Infant Universe Were Surprisingly Mature

Galaxies in the Infant Universe Were Surprisingly Mature

ALMA Shows Volcanic Impact on Io’s Atmosphere

ALMA Shows Volcanic Impact on Io’s Atmosphere

ALMA Factsheet

Virtual Tour

Where is ALMA?

Operation Support Facility (OSF)

San Pedro de Atacama, Chile

Array Operation Site (AOS)

San Pedro de Atacama, Chile

Santiago Central Offices (SCO)

Santiago, Chile

Operations Support Facility (OSF)
The ALMA Operations Support Facility, at an altitude of 2900 metres in the Chilean Andes, serves as the focal point for most of the observatory activities, hosting the antenna control room, laboratories and offices. Address: Kilómetro 121, Carretera CH 23, San Pedro de Atacama, Chile Phone: +56 2 2467 6416
Array Operation Site (AOS)
The ALMA Array Operations Site, at an altitude of 5000 metres in the Chilean Andes, houses the ALMA antennas and the correlator, the fastest data processing system ever used at an astronomical site. Coordinates: 23° 1′ 23.5″ S, 67° 45′ 16.7″ W

Image gallery

See all

ALMA, a worldwide collaboration

The Atacama Large Millimeter/submillimeter Array (ALMA) -the largest astronomical project in existence- is a single telescope of revolutionary design, composed of 66 high precision antennas located on the Chajnantor Plateau, 5000 meters altitude in northern Chile. ALMA is an international partnership of the European Southern Observatory (ESO), the U.S. National Science Foundation (NSF) and the National Institutes of Natural Sciences (NINS) of Japan, together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile.