Shapley–Curtis debate

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The Shapley–Curtis debate was a famous 1920 astronomical discussion between Harlow Shapley and Heber Curtis over the scale of the universe and the nature of spiral nebulae, which helped shape modern cosmology.

All labels observed (4)

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Statements (47)

Predicate Object
instanceOf astronomical debate ⓘ
historical event ⓘ
scientific controversy ⓘ
arguedBy Harlow Shapley ⓘ
Heber Doust Curtis ⓘ
category 1920 in science ⓘ
History of astronomy ⓘ
Scientific debates ⓘ
country United States of America ⓘ
CurtisPosition Milky Way is relatively small ⓘ
linked to: Milky Way

Sun is near the center of the Milky Way ⓘ
spiral nebulae are external galaxies ⓘ
date 1920-04-26 ⓘ
documentedIn Bulletin of the National Research Council ⓘ
field astronomy ⓘ
cosmology ⓘ
followedBy acceptance of galaxies as external systems ⓘ
hasAftermath eventual consensus that spiral nebulae are galaxies ⓘ
refinement of the size of the Milky Way ⓘ
hasParticipant Harlow Shapley ⓘ
Heber Doust Curtis ⓘ
hasTitle The Scale of the Universe ⓘ
historicalContext pre-Hubble period of extragalactic distance scale ⓘ
impact shift from Milky Way–centric universe to galaxy universe model ⓘ
influenced extragalactic astronomy ⓘ
modern cosmology ⓘ
understanding of galaxies ⓘ
language English ⓘ
location National Academy of Sciences ⓘ
Washington, D.C. ⓘ
mainSubject nature of spiral nebulae ⓘ
scale of the universe ⓘ
structure of the Milky Way ⓘ
organizer National Academy of Sciences ⓘ
partOf Great Debate (astronomy) ⓘ
preceded Edwin Hubble’s discovery of Cepheids in Andromeda ⓘ
ShapleyPosition Milky Way is very large ⓘ
linked to: Milky Way

Sun is far from the center of the Milky Way ⓘ
spiral nebulae are part of the Milky Way ⓘ
topic distance to spiral nebulae ⓘ
position of the Sun in the Galaxy ⓘ
size of the Milky Way ⓘ
status of spiral nebulae as island universes ⓘ
usedEvidence Cepheid variable stars ⓘ
linked to: Cepheid variables

globular cluster distribution ⓘ
novae in spiral nebulae ⓘ
year 1920 ⓘ

How these facts were elicited

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

Harlow Shapley → knownFor → Shapley–Curtis debate ⓘ
Harlow Shapley → participantIn → Great Debate (Shapley–Curtis debate) ⓘ
linked to: Shapley–Curtis debate
Harlow Shapley → participantIn → Shapley–Curtis debate on the scale of the universe ⓘ
linked to: Shapley–Curtis debate
Shapley–Curtis debate → partOf → Great Debate (astronomy) ⓘ
linked to: Shapley–Curtis debate