Level 1 — Absolute Beginner
Astronauts live inside small spacecraft for a long time. This can make them feel stressed or lonely.
Engineers at MIT made a new tool to help design better spacecraft.
The tool shows how things like lights and private spaces affect astronauts' feelings.
The tool will help build safer, happier homes for astronauts going to the Moon and Mars.
- astronaut
- a person who is trained to travel and work in space
- spacecraft
- a vehicle used for traveling in space
- stress
- a feeling of worry caused by difficult situations
- lonely
- feeling sad because you are alone
- engineer
- a person who designs and builds machines or structures
- design
- to plan how something will look or work
- privacy
- the state of being alone and away from others
- habitat
- a place where people or animals live
Level 2 — Elementary
Researchers from MIT and the University of Colorado Boulder have created a new tool that connects the design of a spacecraft to how astronauts feel emotionally during long missions.
The tool, called the Human Environment Connection and Interaction Atlas, or HECIA, is supported by NASA. It links features of a spacecraft, such as lighting, privacy, and the layout of rooms, to feelings like stress, fatigue, and homesickness.
The research team looked closely at 14 different emotions and experiences that astronauts might feel, including anxiety, curiosity, nostalgia, and a sense of connection with the crew, known as kinship.
Two design details stood out. First, spacecraft do not have a normal day and night cycle like Earth, which can disturb an astronaut's sleep, so special lighting that changes throughout the day may help. Second, having a private space to be alone can lower stress and give astronauts a greater sense of control over their environment.
- emotionally
- in a way that is related to feelings
- interact
- to communicate with or affect something else
- fatigue
- a feeling of being very tired
- homesickness
- a feeling of sadness from missing home
- anxiety
- a feeling of worry or nervousness
- nostalgia
- a feeling of longing for the past
- kinship
- a close feeling of connection with others
- layout
- the way that parts of a space or room are arranged
Level 3 — Intermediate
A team of researchers from MIT and the University of Colorado Boulder has published, on August 14, 2026, an interactive platform designed to help engineers understand how the physical design of a spacecraft shapes the mental wellbeing of the astronauts who live inside it during long duration missions.
The platform, called the Human Environment Connection and Interaction Atlas, or HECIA, is supported by NASA and maps connections between specific habitat features, including lighting, privacy, shared spaces, and reconfigurability, and psychological outcomes such as stress, fatigue, anxiety, homesickness, sleep quality, and crew cohesion.
In building the atlas, the researchers examined fourteen distinct emotions and experiences that astronauts may encounter in confinement, ranging from anxiety and fatigue to more subtle states like nostalgia, curiosity, and autonomy, the sense of having control over one's own environment and choices.
Two design considerations emerged as particularly important. Because spacecraft lack the natural day night cycle that regulates circadian rhythms on Earth, engineers are exploring specialized lighting systems, already tested aboard the International Space Station, that gradually shift in spectrum to mimic natural light and support healthier sleep. Separately, the researchers found that giving astronauts a place to withdraw from the rest of the crew, even briefly, meaningfully reduces stress by restoring a sense of personal control.
- interactive
- designed to allow direct involvement or two way engagement from a user
- confinement
- the state of being kept within a limited space
- reconfigurability
- the ability of a space or system to be rearranged for different uses
- cohesion
- the state of sticking together or working well as a unified group
- autonomy
- the ability to make one's own decisions and act independently
- circadian rhythm
- the natural internal cycle that regulates sleep and wakefulness over about 24 hours
- spectrum
- the full range of light or colors, from one extreme to another
- withdraw
- to remove oneself from a group or situation, often to be alone
Level 4 — Advanced
A collaborative research effort between MIT and the University of Colorado Boulder culminated on August 14, 2026, in the publication of an interactive platform intended to systematize, for the first time, the relationship between spacecraft architecture and the psychological wellbeing of crews confined within it for extended periods.
The platform, dubbed the Human Environment Connection and Interaction Atlas, or HECIA, and backed by NASA, catalogs correlations between granular habitat design variables, lighting regimes, privacy provisions, communal spaces, and reconfigurability, and a spectrum of behavioral outcomes spanning stress, fatigue, anxiety, homesickness, sleep disruption, and crew cohesion.
In constructing the atlas, researchers mapped fourteen discrete emotional and experiential states astronauts may encounter under confinement, deliberately encompassing not only acute stressors like anxiety and fatigue but subtler, longer horizon phenomena such as nostalgia, curiosity, and autonomy, understood here as the degree of perceived agency over one's immediate environment.
Two design imperatives emerged with particular salience from the analysis. Absent Earth's diurnal cycle, spacecraft habitats disrupt circadian regulation by default, a problem engineers are addressing through tunable lighting systems, already piloted aboard the International Space Station, that modulate spectral output across a simulated day to preserve sleep architecture. Equally consequential, the atlas found that provisioning even modest personal withdrawal space measurably attenuates stress, an effect the researchers attribute to the restoration of perceived autonomy, underscoring that psychological resilience on deep space missions may hinge as much on architectural nuance as on life support engineering.
- systematize
- to arrange information or knowledge into an organized, methodical system
- granular
- involving very small, detailed, specific units of information
- behavioral
- relating to the way a person acts or responds to their environment
- salience
- the quality of being particularly noticeable or important
- diurnal
- relating to a daily cycle, especially the alternation of day and night
- modulate
- to adjust or vary the level or intensity of something
- attenuate
- to reduce the force, effect, or intensity of something
- resilience
- the capacity to recover quickly from difficulties or adapt well to stress
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