Assertion: nebula's core | /r/HasProperty | hot
Facets:
Source sentences:
text: Over thousands of years the young star continues to grow and heat up until its core is hot enough to allow nuclear fusion, this is when hydrogen atoms are fused together producing enormous amounts of energy.
text: Some scientists theorize that the core today might be a hot molten ball of liquid, while other research indicates that it could be a solid rock 14 to 18 times the mass of the Earth.