Across
- 2. rocks that fall into earth and burn up
- 6. a giant spherical shell surrounding our solar system
- 7. an object that orbits a planet or something else that is not a star
- 8. Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ices.
Down
- 1. rocky, airless remnants left over from the early formation of our solar system
- 3. a 4.5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium
- 4. Meteoroids are space rocks that range in size from dust grains to small asteroids.
- 5. A planet is a celestial body that is in orbit around a star