Across
- 3. the natural satellite of the earth, visible (chiefly at night) by reflected light from the sun
- 6. a moon, planet or machine that orbits a planet or star
- 7. the force that attracts a body toward the center of the earth, or toward any other physical body having mass
- 8. the object's orbital motion around another object
Down
- 1. an object's spinning motion about its own axis
- 2. an invisible line around which an object rotates, or spins
- 4. any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources
- 5. the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution