Supposing We Launched a Very Fast Dart from the Space

Supposing we launched a very fast dart from the Space Shuttle, pointed in some direction away from any planet, so that it could travel beyond the solar system. What would it be most likely to hit first after traveling outward for a while?

A) a star other than the Sun
B) an exoplanet
C) an atom of interstellar gas
D) another galaxy
E) its chances of intersecting all of the above is about the same
Section 20.2: Interstellar Gas

Correct Answer:

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