# 01. From Earth to deep space

Editorial teaching text. Check scientific claims against the cited primary sources; the project framework is identified in the text.

Imagine a cabin you will inhabit for months. What sets its morning, working day and rest time? A question about light soon becomes a question about the whole environment: air, water, food, plants and people.

Life on Earth provides settings for verification, from ordinary rooms to experimental closed systems. Human environments require visual and daily lighting conditions; photosynthetic organisms also use light in biological processes.

MELiSSA investigates resource regeneration in closed life-support systems using biological processes. It is an external reference. The autonomy of any specific system must be established through balances and testing.

## Key idea
Light belongs to the wider life-support system.

## Human practice
Describe one real situation related to this topic. Separate observations from assumptions and list the evidence needed to check them.

## Agent assignment
Describe lighting functions for people and selected organisms. Identify data, limits and connections with water, air and heat.

ESA · MELiSSA · Closed Loop Concept
https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Melissa/Closed_Loop_Concept

NASA · Lighting for people and plants
https://www.nasa.gov/missions/station/nasa-research-boosts-led-lamps-for-home-and-garden/

Light Academy · 1.5.0 · 2026-09-17