Big Astronomy

To study the vastness of space, you need extra-large equipment. Explore Chile’s giant telescopes and meet the people behind the lenses in the Academy’s newest planetarium show, premiering online September 26.

Home to one of the world’s largest all-digital planetarium domes, the Academy is an incredible place to see stars on the big screen. For the real thing, however, few places compare to Chile.

In Big Astronomy: People, Places, Discoveries, journey to three world-class observatories in Chile’s rugged Andes Mountains and arid Atacama Desert—remote, extreme regions that happen to have the perfect conditions for astronomical research. Along the way, you’ll meet an inspiring cast of astronomers, engineers, technicians, and support staff who keep these mega-machines running.

While Morrison Planetarium is temporarily closed, we're taking the show online! Join us on YouTube every Wednesday at 11:30 am PT for a 360˚-livestream of Big Astronomy.

View of Chile's Atacama Desert and mountains

The astronomy capital of the world

There’s a reason Chile is home to about 70% of the world’s astronomy infrastructure: Dry, stable air and clear, dark night skies. These ideal atmospheric and meteorological conditions—plus the virtual absence of light pollution—enable Chilean observatories to view celestial bodies thousands of light-years away.

Explore Chile

Technicians cleaning the 4-meter mirror inside Chilean telescope

The best and the brightest

From keeping 4-meter mirrors spotless to interpreting terabytes of interstellar data, running the world’s largest observatories requires the coordinated efforts of hundreds of passionate, talented people with a constellation of diverse skills.

Meet the team

Radio telescope array at ALMA observatory in Chile

Scoping things out

Big Astronomy’s observatories look into space in two different ways. Cerro Tololo Inter-American Observatory (CTIO) and Gemini South Observatory use optical telescopes to collect and magnify visible light with mirrors, while the Atacama Large Millimeter/submillimeter Array (ALMA) is a radio telescope comprising 66 networked antennae that collect radio waves emitted by distant astronomical objects.

Tour CTIO and ALMA

Academy educator demonstrates how telescopes work to students

Stellar resources

Learning or teaching from home? Our Educator Guide brings Big Astronomy’s cosmic concepts back down to Earth. Get clear, concise explanations of key astronomy terms, and dig in to hands-on activities, extensions, and enrichment for students of all ages.

Download the Educator Guide

About the planetarium

From outer space to Earth's inner core, explore the universe from Morrison Planetarium's 75-foot digital dome.

A shot from inside the planetarium of an audience looking at a giant planet Earth

https://calacademy.org/exhibits/morrison-planetarium

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_{Big Astronomy is a collaboration between Abrams Planetarium at MSU, Associated Universities Inc. (AUI), Association of Universities for Research in Astronomy (AURA), Astronomical Society of the Pacific (ASP), California Academy of Sciences, Peoria Riverfront Museum, Ward Beecher Planetarium at YSU, Atacama Large Millimeter-submillimeter Array (ALMA), Vera C. Rubin Observatory construction project, NSF’s NOIRLab facilities Cerro Tololo Inter-American Observatory (CTIO) and the international Gemini Observatory. Big Astronomy is supported by the U.S. National Science Foundation (Award #: 1811436).}