Wanda Hears the Stars: A Blind Astronomer Listens to the Universe

by Amy S. Hansen and Wanda Díaz Merced

This nonfiction picture book introduces Wanda Díaz Merced, an astrophysicist whose loss of sight changed how she accessed information about the universe. By using sonification—turning scientific data into sound—Wanda continued her research and helped demonstrate that listening can offer scientists another way to investigate the stars.

Big Idea

Science benefits when people can explore information in different ways. Wanda's story shows how curiosity, persistence, and accessible tools can expand both participation and discovery.

Discussion Questions

1.What does Wanda's story help us understand about what it means to be a scientist?
2.How did Wanda change the way she worked while keeping her interest in the universe?
3.What might listening to information help someone notice that looking at it might not?
4.How do accessible tools change who can participate in a classroom, a laboratory, or a community?
5.How do the authors and illustrator help us understand Wanda as a whole person, rather than defining her only by her blindness?

Classroom Activity

Star Data, Sound Stories

Students represent a small, teacher-created set of pretend star-brightness measurements as both a visual pattern and a sound pattern. They then write or dictate a brief explanation connecting their experiment to Wanda Díaz Merced's use of sonification. Emphasize that these sounds represent measurements: they are not recordings of stars themselves.

Lesson Plan

⏱ 45 minutes📦 Chart paper or whiteboard, markers, optionally a simple instrument or tone generator

Learning Goals

Identify how Wanda Díaz Merced used sonification to study data about stars.
Explain how representing information in more than one way can support understanding.
Connect the book's themes of perseverance and accessibility to their own classroom experiences.
Describe one way listening to data might reveal patterns that looking at data alone might not.

Activity Steps

1.Read the book aloud, pausing to highlight the moment Wanda begins using sound to study star data.
2.Display a simple table of pretend brightness measurements (5–7 values). Ask students what patterns they notice by looking.
3.Assign each value a tone (higher value = higher pitch). Play or clap the sequence. Ask: What do you notice now?
4.Students write or dictate 2–3 sentences explaining how representing the data as sound changed what they noticed.
5.Close by connecting back to Wanda: How did listening help her keep doing science?

Standards Connections

ELA: RI.K-5.3 — Explain the relationship between events in a text
ELA: RI.K-5.7 — Draw on information from illustrations and words to demonstrate understanding
Science: K-2-ETS1-1 — Ask questions based on observations
SEL: Self-awareness and social awareness
Art: Visual and auditory literacy

Pace-Write-Read Study with Pace-Write It!

Wanda Hears the Stars invites readers to notice how a story can teach the craft of writing by pairing precise facts with sensory language. The book's pacing moves between Wanda's biography and explanations of sonification, demonstrating how nonfiction can carry rhythm and emotion. By attending to how the authors layer information—when they slow to explain, when they quicken to show discovery—students can see how pacing shapes understanding in any genre. This study encourages readers to listen for structure the way Wanda listens for data: with patience and curiosity.

Element	How to notice or teach it in the novel
Pacing	Notice how the text alternates between biographical moments and scientific explanations, creating a rhythm that mirrors Wanda's alternating methods of discovery.
Plot	The story follows Wanda's journey from sighted scientist to pioneer of sonification, with a clear turning point when she loses her sight and finds a new way to listen.
Prosody	Read passages aloud and attend to the rhythm of sentences describing star data—short, precise beats contrast with longer, flowing descriptions of the universe.
Word	Notice how the authors choose precise scientific vocabulary (sonification, astrophysicist, data) alongside sensory words, building a bridge between technical and emotional meaning.
Concept	The concept of sonification—turning data into sound—is introduced through analogy and example, making an abstract idea concrete for young readers.
Voice & Worldview	The narrator's voice is curious and respectful, treating Wanda as a whole person rather than defining her by disability.
Point of View	The third-person narration stays close to Wanda's experience, helping readers understand her perspective without speaking for her.
Setting & Place	The settings—the observatory, the classroom, the universe itself—are described with enough detail to ground the story but not overwhelm it.
Original Characters	Wanda is presented as a multidimensional figure: scientist, collaborator, and advocate, not a simple inspirational symbol.
Dialogue	Any direct quotes from Wanda carry authority and personality, distinguishing her voice from the narrator's.
Details	Notice how specific details—the instruments Wanda used, the sounds she heard—anchor the story in lived experience rather than generalization.
Descriptions	Descriptions of the universe and of sonification use sensory language that helps readers imagine both sight and sound.
Firsts	The book marks Wanda's achievements as firsts—first to use sonification in a specific way—giving the story a sense of discovery.
Immediacy & Engagement	The present-tense moments of discovery pull readers in, creating a sense of being alongside Wanda as she works.
Story Scenes, Summaries & Structures	The book balances scene-level moments (a specific experiment) with summary passages (her career arc), showing how to manage time in nonfiction.
Tension / Suspense / Surprise	The moment of sight loss creates tension; the discovery of sonification creates surprise and relief.
Flashback, Flash-Forward, Cliffhanger	The narrative may flash back to Wanda's early interest in stars, then forward to her later achievements, creating a sense of trajectory.
Page Turns and Chapter Breaks	Notice how page turns are used to create pauses—often at moments of change or discovery.
Pace & Creativity	The book models how creative pacing—slowing for explanation, quickening for discovery—can make nonfiction engaging.
Play	The idea of listening to stars has an element of wonder and play, inviting young readers to imagine sound as data.
Performance	Reading the sonification passages aloud turns the book into a mini-performance, demonstrating the idea in action.
Personality	Wanda's personality—curious, determined, generous—comes through in the authors' choices of what to highlight.
Humor	While the book is not primarily humorous, moments of lightness (the playfulness of listening to data) keep the tone accessible.
Pause	Notice where the text pauses to let readers absorb a concept—these pauses are teaching moments.
Poetry / Poetic Devices	The language about stars and sound sometimes uses metaphor and rhythm, approaching poetry to make science beautiful.
Repetition	The idea of 'listening' recurs throughout, reinforcing the book's central metaphor.
Rhythm	Sentence lengths vary to create rhythm—short sentences for facts, longer ones for description.
Punctuation	Notice how dashes and commas are used to layer information without losing clarity.
Questions	The text may pose implicit questions (How do you study what you can't see?) that drive the narrative forward.
Compare-Contrast	The book implicitly contrasts seeing and listening, before and after sight loss, showing how different approaches can both be valid.
Objects	Objects—telescopes, computers, sound files—serve as concrete anchors for abstract ideas.
Threes	Look for groups of three in descriptions or lists, a common structural device that creates completeness.
Lists	Any lists of tools, methods, or achievements help organize information for young readers.
White Space & Negative Space	The picture book format uses white space to give readers room to think, especially around complex concepts.
Art & Graphics	The illustrations work with the text to show sonification visually—waves, colors, and shapes that represent sound.
Interactives & Gamification	The book invites readers to try listening to data themselves, an interactive extension of the text.
Placement	Notice where key concepts are placed—often at page turns or in the center of spreads for emphasis.
Form	The picture book form allows the story to move between biography and concept, text and image, narrative and explanation.
Dummy	The book's layout—text and image placement—was designed to guide readers through the story's emotional and informational beats.
Passion	Wanda's passion for the stars and for accessible science is the engine of the story and the heart of its teaching.

Pace-Write It!

Students listen to a short clip of sonified data (or a teacher-created sound pattern) and write or draw what they notice. Then they write one sentence describing how listening to information changed what they understood. Share responses and connect back to Wanda's method.