An actor wearing a 1910s white collared shirt, tweed vest and matching trousers stands with elbows resting on a balcony railing. On the right, an actress dressed in a teal jacket and matching floor-length dress, white collared shirt and a period hearing aid stands looking off into the distance. Above them, multiple lightbulbs are suspended on black wire.
Jonathan David Martin and Laura C. Harris in the Ford’s Theatre production of Silent Sky, directed by Seema Sueko. Photo by Scott Suchman.

Silent Sky

An Inspiring New Drama

date January 24, 2020 — February 23, 2020
2 hours with one intermission.
Recommended for 10 and older.

A decade before women gained the right to vote, Henrietta Leavitt and her fellow women “computers” transformed the science of astronomy. In the Harvard Observatory, Leavitt found 2,400 new variable stars and made important discoveries about their fluctuating brightness, enabling fellow scientists to map the Milky Way and beyond. This inspiring drama explores the determination, passion and sacrifice of the women who redefined our understanding of the cosmos.

Director Seema Sueko (Arena Stage’s The Heiress) makes her Ford’s Theatre debut with this compelling story dubbed “sheer magic” by The San Francisco Chronicle.

This production is Helen Hayes Awards Recommended©.

Artistic Team

Director Seema Sueko
Scenic Design Milagros Ponce de León
Costume Design Ivania Stack
Lighting Design Rui Rita
Sound Design and Original Music André J. Pluess
Choreography Karma Camp
Hair and Make-Up Designer Anne Nesmith
Dialects and Vocal Director Lisa Nathans
Production Stage Manager Brandon Prendergast
Assistant Stage Manager Julia Singer


Nora Achrati

Annie Cannon

Laura C. Harris

Henrietta Leavitt

Emily Kester

Margaret Leavitt

Headshot for actor Jonathan David Martin.

Jonathan David Martin

Peter Shaw

Headshot for Holly Twyford.

Holly Twyford

Williamina Fleming


The Gist

Henrietta Leavitt, a real-life scientist, makes a discovery that changes astronomy forever… all before women were even allowed to vote.


What She Did:

Henrietta Leavitt worked at the Harvard Observatory. There she researched a type of stars, called cepheids, whose brightness constantly fluctuate. Through careful study of thousands of photographs of the cepheids, Henrietta calculated the time it took for the stars to go from bright to dim.


Why That Matters:

Henrietta’s measurements helped scientists determine how far away the stars are from Earth. Her research on luminosity informed the work of Edwin Hubble and countless others. Even today, we use her findings to help us understand the expanse of the universe.


The Characters

  • Henrietta Leavitt
    An astronomer who refuses to conform to society’s expectations of her sex.
  • Margaret Leavitt
    Henrietta’s younger sister and a gifted musician.
  • Peter Shaw
    An astronomy fellow at Harvard who falls for Henrietta.
  • Williamina Fleming
    Henrietta’s coworker, who is smart and quick-witted.
  • Annie Jump Cannon
    Henrietta’s coworker, who has made important scientific discoveries of her own and is a suffragette.

Time and Place:

Harvard University, 1900s and 1910s


Things to Watch For


Science Inspired by Art, Art Inspired by Science:

Throughout the play, note how scientific discovery is inspired by art and even described in artistic terms. Margaret’s music inspires Henrietta to think differently about the data she has been looking at, just as a Walt Whitman poem sent by her father reminds Henrietta that math does not fully encompass the beauty of the “mystical” night sky.


Gendered Terms:

Listen for gendered labels that are used to describe women. For example, in Act 1, Margaret worries that Henrietta will be labeled a spinster and Peter immediately refers to the women computers as “Pickering’s Harem.” Compare these terms with how the women want to be described – Annie wants to be a curator and Henrietta demands that her profession be listed as astronomer in the census.


What, Where and Why was this play written?

Lauren Gunderson is currently America’s most produced playwright and American Theatre Magazine has referred to her signature style as a “dramatic blend of science, history and romance.”


Silent Sky, written in 2015, is an example of this style. Silent Sky continues to be produced across the United States, which Gunderson attributes to the relevance of its theme of gender equality: “We are still in the unfortunate rut of under-opportunity and under-representation for women in the sciences and tech … women aren’t asking for special treatment, we are showing how special we already are and always have been. We’re not asking anyone to let us participate, we are exclaiming that we have participated in discoveries, breakthroughs and wild achievement all along.”




Act One


The play opens at a Wisconsin church, around 1900, where Henrietta Leavitt tells her sister, Margaret, that she is leaving home to work at the Harvard Observatory.


On Henrietta’s first day of work, Peter Shaw, one of the lab’s students, shows her to her desk. She asks to see the telescope, but Peter quickly informs her that women aren’t allowed to use that. Women simply work as “computers.” Henrietta’s coworkers – Williamina Fleming and Annie Jump Cannon – explain that Henrietta’s job is to work with the photographic star plates to “collect, report and maintain the largest stellar archive in the world.” They remind Henrietta that, because of their gender, they must “resist the temptation to analyze (the plates).”


Henrietta sets to work, undistracted by letters from home and by Peter’s growing interest in her. She soon discovers Cepheid stars and begins to record their brightness, convinced that she will uncover a pattern. One day, Peter interrupts Henrietta’s research to tell her that he has fallen in love with her. Henrietta returns his affection but is suddenly called away by a letter she can’t ignore – her father has fallen ill.

Henrietta’s visit home grows longer as her father’s condition worsens. Peter’s letters, once frequent, slow to a halt. When their father dies, Margaret tells Henrietta she should return to work. Before she leaves, Margaret performs a piano concerto she has written. Suddenly, Henrietta is struck with an idea – she has found a pattern in the brightness of the Cepheid stars that can finally help to measure the universe.


Act Two


Henrietta’s discovery is published, but when she finally returns to the Harvard Observatory she finds it changed. Peter has married. A research group on the Cepheid stars has started, but Henrietta is not allowed to join. Annie has joined the women’s suffrage movement.


In turmoil, Henrietta takes a boat to Europe so that she can see the stars from the sea. While abroad she gains perspective, but also begins to feel a pain in her abdomen. When she returns to Boston, she is so ill that she must work from home.


One day, Annie, Williamina and Peter arrive to Henrietta’s home to inform her that a Danish astronomer has used Henrietta’s research to measure something outside of the galaxy. To celebrate, the group drives to the telescope at the observatory so that, finally, Henrietta can see her stars.


As the play closes, we learn that soon after visiting the telescope, Henrietta passes away. Incredible research—all built upon Henrietta’s discovery that one could measure the sky using light—has been done in the decades since.

From the Gallery

"Bursting with imagination! Beautifully theatrical!"
– Broadway World
"Five stars! A masterwork of a confection!"
– DC Theatre Scene
"Resonant! A handsome production."
– The Washington Post
"Laura C. Harris gives a radiant performance!"
– Talkin' Broadway
"Inspirational! An incredible gift to all of us. Go see it!"
– Maryland Theatre Guide
"Heavenly! Lauren Gunderson’s luminously beautiful play is an intellectual epic told on an intimate scale."
– Atlanta Journal-Constitution
"A pleasant, thought-provoking evening at the theater! It’s a lively, funny, accessible play that’s alive with interesting ideas."
"Henrietta Leavitt helped map the distances in space, and paradoxically brought us closer to understanding our own place in the universe. Shines with the luminous joy of re-centering women whose achievements have been too long overlooked by the telescope of history. "
– Chicago Tribune

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