Across
- 6. a planet that has a deep massive atmosphere, such as Jupiter, Saturn, Uranus, or Neptune
- 7. a celestial body that orbits the sun, is round because of its own gravity, and has cleared the neighborhood around its orbital path
- 8. a small body from which a planer originated in the early stages of development of the solar system
- 9. one of the highly dense planets nearest t the sun; Mercury, Venus, Mars, and Earth
- 10. the tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction until an outside force acts on the object
Down
- 1. a rotating cloud of gas and dust from which the sun and planets formed; also any nebula from which stars an exoplanets may form
- 2. the time required for a body to complete a single orbit
- 3. a region of the solar system that starts just beyond the orbit of Neptune and that contains dwarf planets and other small bodies made mostly of ice
- 4. the sun and all of the planets and other bodies that travel around it
- 5. the degree of elongation of an elliptical orbit (symbol e)