What Do "Forbidden" Lines Reveal About Interstellar Space

question 17

Multiple Choice

What do "forbidden" lines reveal about interstellar space?

• A)The density or pressure of this gas is much lower than can be produced in a laboratory.
• B)The laws of physics are not the same in space as they are on Earth.
• C)There are unknown elements in space that do not correspond to elements found on Earth.
• D)There are molecules found in meteorites and interstellar dust that are not found on Earth.
• E)All of the above are true.

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