Assertion: matter's presence | /r/HasProperty | inferred
Facets:
value: from gravitational effects on visible matter
type: OTHER
value: from heat
type: CAUSE
Source sentences:
text: As "dark matter", baryonic dark matter is undetectable by its emitted radiation, but its presence can be inferred from gravitational effects on visible matter.
text: In astrophysics and cosmology, dark matter is matter of unknown composition that does not emit or reflect enough electromagnetic radiation to be observed directly, but whose presence can be inferred from gravitational effects on visible matter.
text: The presence of this missing matter in the centres of galaxies and clusters of galaxies has also been inferred from the motion and heat of gas that gives rise to observed X-rays.