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Correct Answer: C) Astronomical units.
Correct Answer: B) Cause fast-moving wind.
Correct Answer: B) Constellations.
Correct Answer: A) Mercury.
Correct Answer: B) Moon.
Correct Answer: C) It is shaped like a pinwheel.
Correct Answer: B) Apparent magnitude.
Correct Answer: B) Astronomers.
Correct Answer: C) Uranus.
Correct Answer: D) 8.
Correct Answer: D) Comet.
Correct Answer: D) Blue.
Correct Answer: B) A little over 1 million.
Correct Answer: A) Planetesimals.
Correct Answer: C) Revolution.
Correct Answer: B) Earth as a reference point.
Correct Answer: C) Immanuel Kant and Pierre-Simon Laplace.
Correct Answer: B) Ptolemy.
Correct Answer: C) Mars.
Correct Answer: D) Asteroids, comets, shattered moons.
Correct Answer: B) They are large bodies in space that orbit the Sun.
Correct Answer: B) Venus.
Correct Answer: C) They all have surfaces that are not solid.
Correct Answer: C) Axial tilt.
Correct Answer: A) Mars.