The creation of ____ require(s) that a young hot star (T $\approx$ 25,000 K) be relatively nearby.
A) emission nebulae
B) HI regions
C) molecular clouds
D) the cool gas of the interstellar medium
E) 21-cm radiation

Question

Quizplus · Accepted Answer

Emission nebulae are created when the hot, young stars within them emit enough energy to ionize the surrounding gas. Therefore, a young hot star must be relatively nearby to provide the necessary energy for the creation of an emission nebula.

The Creation of ____ Require(s) That a Young Hot Star ≈\approx≈

The Creation of ____ Require(s) That a Young Hot Star $\approx$