What Percentage of All Matter Ejected into the Interstellar Medium

question 277

Multiple Choice

What percentage of all matter ejected into the interstellar medium in the Milky Way Galaxy each year by stars is contributed by planetary nebulae?

• A) less than 1%
• B) about 50%
• C) between 10 and 20%
• D) almost 100%

---

Definitions:

Compiled Index

A comprehensive list, usually sorted alphabetically or numerically, that aggregates information from various sources for quick reference.

Formatting Marks

Formatting marks are non-printing characters in a document, such as spaces, paragraph marks, and tab characters, that help in understanding and organizing the layout.

Continuous Section Break

A formatting marker in word processing documents that allows for a change in formatting without starting a new page.

Adjacent Sections

Sections or segments of a document or interface that are positioned next to each other.