Across
- 3. - A massive, luminous sphere of plasma held together by gravity
- 5. - A small rocky body orbiting the sun, mainly found in the asteroid belt
- 7. - A celestial object consisting of a nucleus of ice and dust that, when near the sun, displays a visible atmosphere and sometimes a tail
- 11. - A force that attracts a body towards the center of the earth, or towards any other physical body having mass
- 12. - A region of space having a gravitational field so intense that no matter or radiation can escape
- 14. - A powerful and luminous stellar explosion
- 16. - An instrument used to observe distant objects by collecting electromagnetic radiation
- 17. - A small body of matter from outer space that enters the earth's atmosphere, appearing as a streak of light
- 18. - A natural satellite orbiting a planet
- 19. - An interstellar cloud of dust, hydrogen, helium, and other ionized gases
- 21. - The gravitationally curved path of an object around a point in space
- 24. - An artificial or natural body that revolves around a planet
- 25. - A celestial body orbiting a star, like Earth around the Sun
Down
- 1. - The Sun and all the objects that are bound to it by gravity
- 2. - A large, bowl-shaped cavity on the surface of a planet or moon, typically caused by an explosion or the impact of a meteorite
- 4. - The galaxy that contains our Solar System
- 6. - All of space and time and their contents, including planets, stars, galaxies, and other forms of matter and energy
- 8. - A vast collection of stars, gas, and dust held together by gravity
- 9. - The distance that light travels in one year, used to measure astronomical distances
- 10. - A group of stars forming a recognizable pattern
- 13. - The branch of astronomy concerned with the physical nature of stars and other celestial bodies
- 15. - A planet that orbits a star outside our solar system
- 20. - The universe seen as a well-ordered whole
- 22. - An event in which the shadow of one celestial body falls on another
- 23. - The band of colors, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction