Across
- 3. Events Linked to global climate changes and mass extinctions
- 4. Large ball of gas held together by gravity
- 6. A body that orbits a planet or an asteroid
- 9. Crater Depressions in Earth's crust created by meteorites
- 10. Solid object composed of water or methane mixed with rock and metal
- 13. Planets Planets with large diameters and low densities composed of gas
- 16. Attractive force between two objects in the universe
- 19. Object Any object above the Earth's atmosphere
- 21. Bang The universe may have began with this event
- 22. Shift Observer and object moving apart causing electromagnetic waves to spread out
- 23. Shape of the Earth's orbit around the sun
- 24. Measures how bright stars would be at the same distance
- 25. Collection of billions of stars, gas, and dust
Down
- 1. Planets spin on an imaginary axis in motion
- 2. Concept that an object at rest will tend to remain at rest
- 5. A planet's path around the sun
- 7. Effect, Shifting of wavelengths
- 8. Way Spiral shaped galaxy our solar system belongs to
- 11. Planets, Planets close to the sun that are mostly solid
- 12. Two fixed points on an ellipse
- 14. Solid, irregular shaped rocky or metallic body that orbits the sun
- 15. System Sun and all the objects that orbit the sun
- 17. Fusion, Combining small nuclei to make large nuclei, producing energy
- 18. Shift Observer and object moving together causing electromagnetic waves to group closer together.
- 20. The degree of flatness or ovalness