Events in Chile

Filter Events by Sub-Category

Please select a Date first.

Search for a company in Chile

Debug

Welcome

Login to your account below, if you do not have an account, select Register.

Or Login with your preferred Social Media Account

Sign in with Facebook Sign in with Twitter Sign in with Google

Register your account below, if you already have an account, select Login.

Atacama Large Millimeter Array

AttractionsToursNature & Adventure ToursCulinary & NightlifeCulture & History ToursTheme Tours
Best activities in Chile - European Southern Observatory (ESO) provides detailed information on the ALMA in San Pedro Atacama.

What is the Atacama Large Millimeter/submillimeter Array (ALMA)?
High on the Chajnantor plateau in the Chilean Andes, the European Southern Observatory (ESO), together with its international partners, is operating the Atacama Large Millimeter/submillimeter Array (ALMA) — a state-of-the-art telescope to study light from some of the coldest objects in the Universe. This light has wavelengths of around a millimetre, between infrared light and radio waves, and is therefore known as millimetre and submillimetre radiation. ALMA comprises 66 high-precision antennas, spread over distances of up to 16 kilometres. This global collaboration is the largest ground-based astronomical project in existence.

What is submillimetre astronomy?
Light at these wavelengths comes from vast cold clouds in interstellar space, at temperatures only a few tens of degrees above absolute zero, and from some of the earliest and most distant galaxies in the Universe. Astronomers can use it to study the chemical and physical conditions in molecular clouds — the dense regions of gas and dust where new stars are being born. Often these regions of the Universe are dark and obscured in visible light, but they shine brightly in the millimetre and submillimetre part of the spectrum.



Why build ALMA in the high Andes?
Millimetre and submillimetre radiation open a window into the enigmatic cold Universe, but the signals from space are heavily absorbed by water vapour in the Earth's atmosphere. Telescopes for this kind of astronomy must be built on high, dry sites, such as the 5000-m high plateau at Chajnantor, one of the highest astronomical observatory sites on Earth.

The ALMA site, some 50 km east of San Pedro de Atacama in northern Chile, is in one of the driest places on Earth. Astronomers find unsurpassed conditions for observing, but they must operate a frontier observatory under very difficult conditions. Chajnantor is more than 750 m higher than the observatories on Mauna Kea and 2400 m higher than the VLT on Cerro Paranal.



Why is ALMA an interferometer?
ALMA is a single telescope of revolutionary design, composed initially of 66 high-precision antennas, and operating at wavelengths of 0.32 to 3.6 mm. Its main 12-metre array has fifty antennas, each measuring 12 metres in diameter, which together act as a single telescope — an interferometer. An additional compact array of four 12-metre and twelve 7-metre antennas complements this. The 66 ALMA antennas can be arranged in different configurations, where the maximum distance between antennas can vary from 150 metres to 16 kilometres, which gives ALMA a powerful variable “zoom”. It can probe the Universe at millimetre and submillimetre wavelengths with unprecedented sensitivity and resolution, with a vision up to ten times sharper than the Hubble Space Telescope, and complementing images made using the VLT Interferometer.


Science with ALMA
ALMA is the most powerful telescope for observing the cool Universe — molecular gas and dust. ALMA studies the building blocks of stars, planetary systems, galaxies and life itself. By providing scientists with detailed images of stars and planets being born in gas clouds near our Solar System, and detecting distant galaxies forming at the edge of the observable Universe, which we see as they were roughly ten billion years ago, it lets astronomers address some of the deepest questions of our cosmic origins.

ALMA was inaugurated in 2013, but early scientific observations with a partial array began in 2011. See press release eso1137 for more information.

Directions

San Pedro Atacama

View Larger Map

Budget

  • Affordable

Best For Whom

  • For Her
  • Couples
  • For Him
  • Families With Teenagers
  • Backpackers
  • Students
  • Groups

Best For What

  • Cultural Experience
  • Nature
  • Off The Beaten Path
  • Wildlife
  • The Local Experience
  • Outdoor Area
  • A View To Die For

Gallery

My Lists

Create New Guide

OR

Mini Guides
Arrow

Login to create your guides for Chile.

Add to My Guide

Create New Guide

Cancel

Cancel

You Might Also Like

Create & Share your Guide to Chile with friends and family!

Add your recommended places to visit by browsing the website and pressing the icon.

Create your own guide of favourite 'must see' places

Earn your Local Expert badge by Sharing your guides with others

Get your guide seen by submitting it to the Mini Guides section

Lists

Mini Guides

Part of the My Guide Network

My Guide Chile is part of the global My Guide Network of Online & Mobile travel guides.

We are now in 120+ Destinations and Growing. If you are interested in becoming a local travel partner and would like to find out more then click for more info about our Website Business Opportunity.

Nearby Destinations