ABOVE: The Atacama Large Millimeter/submillimeter Array at its 16,500 ft elevation site in northern Chile. Still under construction, ALMA is the most powerful telescope of its kind in the world. At the time of this photo, 19 radio telescopes were in the array. Upon completion in 2013, 66 radio telescopes will fan over a nearly 100 square mile area.

ABOVE: In this set of video clips, we establish ALMA's location on the Chajnantor Plain of northern Chile then zoom in to see its many styles of telescopes working together to observe the skies as one.

ABOVE: View from the center of the Atacama Large Millimeter/submillimeter Array at an elevation of 16,500 feet on the Chajnantor Plain in northern Chile. Each of these radio telescopes has a dish spanning nearly 40 feet across.

ABOVE: The Atacama Large Millimeter/submillimeter Array can be rearranged to suit different astronomy observing needs. During their relocations, the 115-ton telescopes are kept powered on the back of the gentle monster trucks, ALMA Transporters.

ABOVE: The Atacama Large Millimeter/submillimeter Array is the highest astronomical telescope array in the world. This infographic compares the elevations of a few of the major observatories of the world with ALMA.

ABOVE: ALMA Opens Its Eyes, a short movie with scientists describing ALMA Early Science and the first astronomical test images created by the National Radio Astronomy Observatory.

ABOVE: ALMA antennas rotate under the clear blue sky of the Chilean Altiplano. Here, observing conditions for ALMA are ideal.

ABOVE: This compilation features video sequences taken at the ALMA Observatory in the second half of 2011. The video shows the numerous activities at ALMA, starting with the array of antennas on the Chajnantor Plateau Ñ the Array Operations Site (AOS), followed by footage from the Operations Support Facility (OSF), to further document the project's progress. The material has been edited especially for broadcast use, without commentary or music.