Across
- 1. moving in a path around something
- 5. a force that pulls objects towards each other
- 8. how bright a star looks from Earth
- 10. a system of objects in space that includes at least one star, planets, their moons, asteroids, comets, and other space debris
- 11. to spin on an axis
- 12. a type of constellation that is always visible, regardless of the season
- 13. a large sphere-shaped object that revolves around a star
Down
- 2. a collection of dust, gas, stars, and their solar systems
- 3. repeating, predictable pattern of change in the moon’s appearance from Earth
- 4. an event during which the moon’s shadow blocks all or some of the sun’s light
- 6. an imaginary line through the center of an object that provides a fixed point of reference
- 7. all existing matter in space
- 9. a space object in a fixed point in the sky that gives off its own heat and light