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.
Question 2
Studying the magnetospheres of the jovians has allowed us to measure their:
A) rotation rates.
B) orbital period.
C) orbital radius.
D) gravity.
E) ring system diameters.
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