The solar wind consists of a stream of charged particles, primarily electrons and protons, that are continuously ejected from the upper atmosphere of the Sun. This flow extends throughout the solar system, not just between the Sun and Mercury or in explosive expansions, but as a constant, gentle stream moving outward from the Sun.

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The Solar Wind Is

Question 90

Multiple Choice

The solar wind is

A) the flow of matter onto the Sun under gravitational attraction.
B) ionized hydrogen gas and electrons orbiting the Sun between its surface and the planet Mercury.
C) a violent, explosive expansion of specific regions of the Sun's atmosphere at certain times.
D) a gentle flow of solar material, mostly protons and electrons, that is always moving outward from the Sun.

Correct Answer: