Foundations of Energy
How energy is stored, transferred and transformed — from falling objects to living cells.
Graph explorer
Explore the knowledge graph
88 concepts viewed through this lens. Bridge concepts connect this view to Acoustics, Aerospace Engineering, Analytical Chemistry, Arithmetic….
Legend
- Focused concept
- Connected concept
- Bridge concept (just outside the lens)
- Arrow points from cause / source to effect / target
- A line with no arrow is a two-way relationship
- Node colour marks the concept’s primary discipline
2 concepts1 relationships2 disciplines1 relation families
Light-year
Open concept →At a glance
A light-year, alternatively spelled light year, is a unit of length used to express astronomical distances and is equal to exactly 9460730472580.8 km, which is approximately 9.46 trillion kilometres or 5.88 trillion miles.
- Disciplines
- Astronomy
- Role in the graph
- Leaf concept
- Relationships
- 1 · 1 relation families
- Mental models
- 1
What am I looking at?
In this lens (88)
Bridge concepts (107)
Just outside the lens — they connect it to other context.
- Astrophysics, Cosmology · connects to Cosmic microwave background, Dark energy, Dark matter
- Physics · connects to Electromagnetic radiation, Gravitational lens, Telescope
- Wave3Acoustics, Oceanography, Optics, Physics · connects to Doppler effect, Electromagnetic radiation, Gravitational wave
- Planetary Science · connects to Planet formation, Protoplanetary disk
- Physics · connects to Dark energy, Nuclear fusion
Insights from this view
Structural observations about the concepts shown here — descriptions of this graph, not claims about the world.
- This view connects 2 disciplines: Astronomy, Physics.
- Scale explains 2 concepts in this view (Astronomy, Physics).
Relationships as a list
The focused concept’s relationships. Pick another concept in the graph above to update this list.
Explore through a different lens
A lens is a deterministic projection of the graph. Pick a discipline, thinking pattern or journey to reframe the whole view.
By thinking pattern
Bayesian updatingCause and effectCompoundingConservationConstraintsDefense in depthDiffusion & spreadEmergenceEnergy transformationEntropy & irreversibilityEquilibriumFeedback loopIncentivesInformationLevels & hierarchyModularityNetworksOptimizationOscillationProbabilityRecursion & self-similarityScaleSignal vs noiseSource–pathway–receptorStocks and flowsSymmetry & invarianceThresholds & tipping pointsTrade-offsTriangulationVariation & selectionWaves
Concept collections
Concept collections are curated lenses onto the fabric — themed sets of ideas that recur across disciplines. They are not journeys; they are a way to read the graph.
Understanding Systems
Stocks, flows and feedback — why wholes behave in ways their parts do not.
Patterns Everywhere
Regularities that recur across maths, music, nature and art.
How Information Moves
Encoding, signals and noise — the same idea in computers, genes and nerves.
About this view
What this is
Start from one concept and expand outward. The view never shows everything at once — click a node to refocus, filter by relationship type, or switch to an accessible list.
One fabric
3750 concepts and 5051 typed relations form one connected component — no isolated silo.
How to read it
Focus a concept, or apply a lens (discipline, mental model, journey) to see only the threads that matter.