Hair Care in Zero Gravity
On the International Space Station (ISS), everyday chores become a science experiment. One of the most unexpected challenges is washing a head of hair when there is no gravity to guide water to the drain.
The Problem
- Crumbly food or loose droplets can float and block vents or electronics.
- Even a single splash of water can become a hazard if it drifts into sensitive equipment.
How Astronauts Approach the Task
NASA’s Astronaut Nichole Ayers demonstrated the process in a brief video released on Tuesday.
Step 1 – Controlled Wetting
Ayer uses a water‑filled pouch equipped with a one‑way valve. By pressing the tube firmly against her scalp, she ensures that the water flows only where she intends, preventing free-floating droplets.
Step 2 – Shampooing
She applies a shampoo bar to a damp, but not soaking, head. The bar dissolves easily in the small quantity of water she has released, eliminating the need for liquid shampoo.
Step 3 – Rinse and Condition
- Only the scalp is rinsed, as spreading the rinse along the hair can cause droplets to escape.
- After a quick dry, she adds a conditioner, brushes lightly, and lets it air‑dry, allowing the moisture to evaporate safely.
Recycling the Water
The ISS recycles almost everything. The evaporated water will be captured by the station’s environmental control system and repurposed—perhaps turning into a cup of coffee for one of the crew members later.
For a deeper look into daily life aboard the ISS—including how astronauts handle showers and even bathroom use—watch the short videos many crew members have shared over the years. The simplicity of a space hair routine makes a great example of how thoughtful design and careful planning keep our space explorers safe and comfortable.
