Across
- 2. the force of attraction between two objects
- 3. a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.
- 6. a huge region beyond the gas giant planets, made up of different-sized icy chunks of matter
- 8. one of the four small, rocky planets closest to the Sun. These are Mercury, Venus, Earth, and Mars.
Down
- 1. a band of orbiting rubble that separates the gas giant planets from the terrestrial planets
- 4. a small, solid object that orbits the Sun
- 5. a mass of ice, rock, and gas orbiting the Sun
- 7. a push or pull that can change the speed and direction of a moving object