Hubble–Lemaître law
Hubble's law, officially the Hubble–Lemaître law, is the observation in physical cosmology that galaxies are moving away from Earth at speeds proportional to their distance.
At a glance
Key signals
0% cross fields · reaches 0 more
- Astronomy
- Explanation
- Examples
- Misconception
- Sourced relations 2
- Attribution
Dependencies
What this concept builds on and what it makes possible — derived from the atlas’s dependency, causal and structural relations, not from every related edge.
Foundations · builds on
Hubble–Lemaître lawdepends onRedshiftEstablished
Hubble–Lemaître law depends on redshift.
Mechanism: Hubble's law: the farther a galaxy, the faster it recedes — measured from its redshift, it is the key evidence for cosmic expansion.
- Wikipedia (English & German editions) verifiedmoderate evidence
Structural role & consequence
Interpreted from the current atlas graph — what the connections mean, not just how many there are.
Currently dark in the atlas: 2 of 2 of its relations lack claim-level evidence.
atlas representation · Describes the current Thinking OS representation, not the state of the world.
Builds on 1 foundation (requires / depends-on / derived-from / emerges-from).
structural · Structural graph analysis — not a claim of importance, causation or history.
Structural neighbourhood: 2 → 5 → 19 concepts reachable within 3 hops.
structural · Structural reach — being reachable is not the same as being understood.
All 2 of its relationships stay within its own discipline — a field-specific concept in the current atlas.
structural · Structural graph analysis — not a claim of importance, causation or history.
cross-field
2 within-field, 0 cross-field
Strengths & constraints
Constraints
- Evidence coverage currently thin in the atlas — few of its relationships carry claim-level evidence. atlas representation
Conditions
- Its dependency reading rests on 1 foundation relation. structural
- Read structurally — most of its relationships carry no external evidence yet, so claims here are graph-derived. structural
Dependency radial
What this concept builds on (left) and what it makes possible (right) — derived from dependency and causal relations.
Seen through each discipline
How this concept sits in each of its fields — derived from its real connections in the graph, not asserted.
Through this lens it connects to Expansion of the universe and Redshift.
Formula
A galaxy's recession velocity is proportional to its distance — evidence for an expanding universe.
v— recession velocityH_0— Hubble constantd— distance
Source: A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae
Key dates
- 1927DiscoveryLemaître proposes an expanding universe and estimates the expansion rate.
- 1929PublicationHubble publishes the distance–velocity relation. — A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae
Related ideas to explore
Concepts that look related but are not yet connected here — candidates for a connection to reason about, not established links.
This idea also appears in…
The same structure shows up in other disciplines. These are real recurrences drawn from the graph — a starting point for asking “what carries over, and what changes?”
Cause and effect34 disciplines · 31 concepts
Concepts
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Mental models at work here
- Connects 2 other ideas across 1 discipline.
- Most of its connections are of the “Dependency” kind.
- It exercises 1 reusable thinking pattern.
Derived from the graph’s real structure — observations, not a score.
Sources
- Wikipedia (English & German editions) verifiedmoderate evidence
- Wikidata verifiedmoderate evidence