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the claim
Spiral galaxies rotate with their arms trailing behind their direction of spin
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
3 sources for · 0 against

Observational studies of spiral galaxies consistently confirm that their spiral arms trail behind their overall direction of rotation.

Evidence for · 3
ALMA captures feeding and feedback from the active galactic nucleus in NGC 613
2019 · cited by 29
Observations of NGC 613 reveal a two-arm trailing nuclear spiral.
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The analysis

Multiple papers explicitly observe or build upon the standard astronomical finding that spiral arms in galaxies are trailing structures.

More for · 2
DISENTANGLING THE CIRCUMNUCLEAR ENVIRONS OF CENTAURUS A: GASEOUS SPIRAL ARMS IN A GIANT ELLIPTICAL GALAXY
2012 · cited by 9
Observations of the giant elliptical NGC 5128 indicate that its gaseous spiral arms are trailing.
SIGNALS on the mixing of oxygen and nitrogen in the spiral galaxy NGC 6946
2025 · cited by 2
Analysis of elemental abundances in NGC 6946 supports gas flow models where the trailing edge shows specific enrichment patterns relative to a rotating disk.
Everything we examined (12)
We also searched for evidence AGAINST this claim, not only for it.
  1. Galaxy Zoo: unwinding the winding problem – observations of spiral bulge prominence and arm pitch angles suggest local spiral galaxies are windingpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  2. ALMA captures feeding and feedback from the active galactic nucleus in NGC 613peer-reviewedsupports
  3. Kilonovae.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  4. Binary Neutron Star Mergers.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  5. Rotating stars in relativity.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  6. Rotatum of light.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  7. DISENTANGLING THE CIRCUMNUCLEAR ENVIRONS OF CENTAURUS A: GASEOUS SPIRAL ARMS IN A GIANT ELLIPTICAL GALAXYpeer-reviewedsupports
  8. Galaxy morphologies at cosmic noon with JWST : A foundation for exploring gas transport with bars and spiral armspeer-reviewedno side takennot shown: read and judged not to bear on this claim
  9. A SOFIA Survey of [C ii] in the Galaxy M51. II. [C ii] and CO Kinematics across the Spiral Armspeer-reviewedno side takennot shown: read and judged not to bear on this claim
  10. Electromagnetic counterparts to massive black-hole mergers.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  11. SIGNALS on the mixing of oxygen and nitrogen in the spiral galaxy NGC 6946peer-reviewedsupports
  12. Discrete spiral modes in disk galaxies: Some numerical examples based on density wave theory.peer-reviewedno side takennot shown: read and judged not to bear on this claim
The paper trail · every fact has a biography
first checked06 Aug 2026
judged → SUPPORTED · 8406 Aug 2026
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