Great Refractor Telescope Tours - Center for Astrophysics | Harvard & Smithsonian

Step behind the scenes and discover one of the most important instruments in the history of American astronomy. Built in 1847, the Great Refractor Telescope was the largest telescope in the United States for over twenty years and played a pivotal role in advancing our understanding of the universe.

Today, this remarkable instrument stands as a centerpiece of the Center for Astrophysics | Harvard & Smithsonian, one of the world's leading institutions for astronomical research and discovery, where generations of scientists have continued to expand humanity's understanding of the cosmos.

This guided tour explores not only the remarkable history and engineering of the Great Refractor itself, but also the extraordinary legacy of the women of the Harvard College Observatory. Working in an era when opportunities for women in science were limited, these pioneering astronomers transformed our understanding of the cosmos through their meticulous observations and groundbreaking discoveries.

Join us for a journey through nearly two centuries of astronomical history and discover how one historic telescope, the world-class institution that preserves it, and the remarkable people who worked alongside it helped change science forever.

Please note the following before your visit:

• The event begins in the Phillips Auditorium, located at the rear of the Center for Astrophysics complex near Madison Street and our large parking lot at 60 Garden Street, Cambridge.

• Although tickets are free, this is a ticketed event, and every attendee must have a ticket for entry.

• Please be aware that this tour includes stairs, and there is currently no step-free access available.

• Please arrive 10 minutes before the tour begins to allow time for parking and seating.

• Doors open at 2:45 PM. We kindly ask that you do not arrive earlier than this time.

• The tour begins promptly at 3:00 PM. Unfortunately, we are unable to accommodate late arrivals.

• Metered parking is available on site. The parking meters are located at the far end of the main parking lot.

• Some photography may take place during the event. If you have any concerns about being photographed, please let a member of staff know.

We look forward to your presence at the event!

Best regards,
Communication and Outreach
Center for Astrophysics | Harvard & Smithsonian