The creation of ____ require(s) that a young hot star (T 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 by young hot stars ionizing the surrounding gas. Therefore, a young hot star needs to be relatively nearby to create an emission nebula. Emission nebulae are clouds of ionized gas that emit light of various colors. This ionization is caused by the intense radiation from young, hot stars (typically T 25,000 K), which ionizes the surrounding gas. Therefore, the creation of emission nebulae require that a young hot star be relatively nearby.

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