A surprising fact about a 1 M _$\odot$ protostar is that, even though nuclear reactions have not yet started in their cores, they are _________ than the Sun. A) hotter B) rotating faster C) smaller D) denser E) more luminous

Question

Quizplus · Accepted Answer

A protostar that has not yet begun nuclear reactions does not have a stable energy source yet. However, it is powered by gravitational contraction, which means that it becomes progressively more luminous as it shrinks and heats up. As a result, protostars can be much more luminous than mature stars of the same mass, including the Sun.

A Surprising Fact About a 1 M ⊙\odot⊙ Protostar Is That, Even Though Nuclear Reactions Have

A Surprising Fact About a 1 M _$\odot$ Protostar Is That, Even Though Nuclear Reactions Have