Across
- 7. is a natural science which is the study of celestial objects
- 9. are glowing fragment of rock matter in space that burn and glow upon entering the atmosphere of Earth.
- 11. Stars including their creation, evolution ,and death
- 12. is a spherical collection of stars that orbits a galactic core as a satellite
- 13. They neither spiral nor elliptical
- 14. are composed of alloys of iron and nickel
- 15. is a planet that orbits a star other than the Sun, a stellar remnant, or a brown dwarf
- 16. is a unit of length used informally to express astronomical distances
- 18. outer visible layer of the sun
- 20. are composed of a mixture of stony silicate material and iron.
Down
- 1. are minor planets that circe the Sun in a region called the Asteriod Belt
- 2. are large groups of smaller galaxy clusters or galaxy groups and are among the largest known structures of the cosmos
- 3. used to study the features of the sun
- 4. is the cloud of gas that became the sun
- 5. common type of galaxy
- 6. most common type of meteorites
- 8. is a congregation of solar system, stars, dusts, and gases held together by gravity
- 10. refers to group or stars within the galaxy that resembles each other in terms of age, spartial distribution, or chemical composition
- 17. asteroids that orbits outside the outer solar system
- 19. is the large, dim region surrounding the entire galaxy