What Is a Planetary Nebula

question 74

Multiple Choice

What is a planetary nebula?

• A) Gas ejected from a low-mass star in the final stage of its life
• B) Gas created from the remains of planets that once orbited a dead star
• C) Interstellar gas from which planets are likely to form in the not-too-distant future
• D) The remains of a high-mass star that has exploded

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Definitions:

Radial Development

Growth or expansion that spreads out uniformly in all directions from a central point, often used to describe the growth pattern of cities or tumors.

Stinging Cells

Specialized cells found in some animals, such as jellyfish, that contain a stinging structure used for capturing prey or defense.

Pores

Small openings on the surface of the skin or other tissues, often serving as passageways for fluids or gases.