Meaning: Asteroids move quickly through the empty space of the universe.
Choice of Words: Asteroids: small, rocky objects in space; hurdle: jump or leap over an obstacle; void: empty space.
Meaning: This means that asteroids are moving very fast through the empty space beyond our planet.
Choice of Words: Asteroids are space rocks. Speed means to move quickly. Space is the vast emptiness beyond our planet.
Meaning: This means that asteroids are moving quickly through a space that has nothing in it.
Choice of Words: Rush means to move quickly. Emptiness is a space with nothing in it.
Meaning: This means that asteroids are moving through a completely empty space.
Choice of Words: Fly means to move through the air. Void is a space that is completely empty.