Assertion: supernova's gravity | /r/Causes | the core
Facets:
value: to contract
type: TRANSITIVE-OBJECT
Source sentences:
text: Eventually, as the hydrogen at the core is exhausted, fusion starts to slow down, and gravity causes the core to contract.
text: As the hydrogen is used up, fusion reactions slow down resulting in the release of less energy, and gravity causes the core to contract.