Gravitational waves travel at the speed of light

the verdict

SUPPORTED

the evidence backs this

Recorded sources

4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Multimessenger observations, particularly from binary neutron star mergers such as GW170817, have empirically confirmed that gravitational waves travel at the speed of light.

The analysis

The retrieved literature consistently supports the consensus that gravitational waves travel at the speed of light, validated by multimessenger observations like GW170817.

Evidence for · 4

Constraining the effective field theory of dark energy with multimessenger astronomy

Recorded source metadata

A. E. Romano. Constraining the effective field theory of dark energy with multimessenger astronomy. 2023. https://doi.org/10.1103/PhysRevD.111.084086

Discusses constraining the propagation speed of gravitational waves using multimessenger astronomy.

Source citation format

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More for · 3

GW170817: A Short Review of the First Multimessenger Event in Gravitational Astronomy

Recorded source metadata

R. Poggiani. GW170817: A Short Review of the First Multimessenger Event in Gravitational Astronomy. 2025. https://doi.org/10.3390/galaxies13050112

Notes that joint gravitational and electromagnetic observations from events like GW170817 have been used to estimate the speed of gravitational waves.

Source citation format

Measuring the speed of gravity and the cosmic expansion with time delays between gravity and light from binary neutron stars

Recorded source metadata

L. Iampieri, S. Mastrogiovanni, F. Pannarale. Measuring the speed of gravity and the cosmic expansion with time delays between gravity and light from binary neutron stars. 2024. https://doi.org/10.1103/PhysRevD.111.023533

Proposes methodologies utilizing time delays between gravitational waves and gamma-ray bursts to constrain the speed of gravity.

Source citation format

LIGO/Virgo Listens to Neutron Stars

Recorded source metadata

J. Moffat. LIGO/Virgo Listens to Neutron Stars. 2020. https://doi.org/10.1093/oso/9780190650728.003.0008

States that observations from neutron star mergers provide an extremely accurate determination that the speed of gravitational waves matches the speed of light.

Source citation format

The paper trail · every fact has a biography

first checked31 Jul 2026

judged → SUPPORTED · 7931 Jul 2026

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