Week 1: Can space be heard?

Separate physical sound, electromagnetic measurement and designed sonification.

Week 01 · Listening claim

26 July 2027

What exactly are we hearing when an astronomical dataset becomes sound?

Data object
synthetic light curve
Lecture deckOpen the taught visual narrative

The question

Space is not a recording studio. Most course examples begin as measurements that are translated, scaled and sequenced before a speaker moves. We establish the distinction between audification (replaying a signal in an audible range) and parameter mapping (assigning data dimensions to sound dimensions).

Signal chain

Synthetic brightness samples → normalize 0–1 → map to pitch or interval → play in sample order. The mapping is designed; the dip in the values is not.

Explore the course Open Listening Lab and compare both mappings. Record what each makes easy to notice and what it hides.

Observation guide 01

Listening claim

Use this page before the slides, then return to the checkpoint after the lab.

After this week, you can

  1. Distinguish physical sound, audification and parameter mapping.
  2. Write a mapping rule that another person can reconstruct.
  3. Separate a measured pattern from the musical choices used to present it.

Inspectable teaching model

relative brightness
Synthetic relative brightness sampled at equal time intervals. Values are a teaching model, not an astronomical observation.

Worked notebook

One dip, two readings

Synthetic relative brightness sampled at equal time intervals.

  1. Keep the sample order and interval fixed.
  2. Map 0.83 to 220 Hz and 1.00 to 660 Hz with a linear scale.
  3. Replay the same values with constant pitch and longer gaps for lower values.
  4. Record which version makes the central dip easier to locate.

What the method supportsBoth versions preserve the location of the dip. Only the pitch version preserves value order as pitch order. The rhythm version invents unequal playback time.

CheckpointA headline calls this sequence the sound of an exoplanet. What information is missing before that claim becomes checkable?Reveal the reasoning

The source, measured quantity, processing and data-to-sound rule.

A light curve records brightness over time. A speaker receives audio only after someone selects, scales and schedules those values. Naming that chain separates the observation from its audible representation.

Read from the source

Exoplanet Watch overview by NASA Science

See how telescope images become transit light curves before any sonification begins.

Where this goes next

This distinction becomes the disclosure rule used in every later lab and assessment.

Teaching team