Across
- 4. The third planet from the Sun, unique for its abundant liquid water and ability to harbor life.
- 7. Any natural object located outside of Earth's atmosphere, such as planets, moons, stars, and asteroids.
- 9. The orbital movement of one object around another, such as the Earth traveling around the Sun.
- 10. The star at the center of our solar system that provides the light, heat, and gravity required to sustain life on Earth.
Down
- 1. The attractive force that pulls objects toward one another, keeping planets in orbit and creating tides
- 2. The spinning of a celestial body on its own internal axis, which creates the cycle of day and night.
- 3. The common center of mass around which two or more celestial bodies orbit each other
- 5. The angle of inclination of a planet's rotational axis relative to its orbital plane (Earth's tilt is roughly 23.5 degrees).
- 6. Earth's only natural satellite, which orbits our planet and reflects the Sun's light.
- 8. An imaginary line passing through the center of a body (like Earth's North and South poles) around which it spins.