A planetary nebula
A)produces an absorption spectrum.
B)produces an emission spectrum.
C)is contracting to form planets.
D)is contracting to form a star.
E)is the result of carbon detonation in a 1- star.

Question

A planetary nebula
A)produces an absorption spectrum. 
B)produces an emission spectrum. 
C)is contracting to form planets. 
D)is contracting to form a star. 
E)is the result of carbon detonation in a 1- star.

Quizplus · Accepted Answer

A planetary nebula is formed by the ejected outer layers of a dying star that are ionized by the remaining hot core of the star. These ionized gases produce an emission spectrum, which is a characteristic of a planetary nebula.

A Planetary Nebula