A surprising fact about a protostar is that,even though nuclear reactions have not yet started in their cores,they are __________ than the Sun.

Question

A surprising fact about a  protostar is that,even though nuclear reactions have not yet started in their cores,they are __________ than the Sun.

Quizplus · Accepted Answer

Protostars are still in the process of gravitational contraction, during which they release enormous amounts of energy in the form of radiation. This radiation makes them appear more luminous than the Sun, even though they have not yet started nuclear reactions in their cores.

A Surprising Fact About a Protostar Is That,even Though