Astronomy Crossword

4. the path an object takes as it moves around another object in space
7. Year the distance light travels in one year
10. a star in the stable, middle part of its life cycle where it fuses hydrogen into helium
11. a huge ball of hot, glowing gas that produces energy through nuclear fusion
13. the galaxy that contains our Solar System
15. the early stage of a star’s formation before nuclear fusion begins
17. study of stars, planets, galaxies, and objects in space
18. a late stage in a star’s life when it expands and cools after using most of its hydrogen
19. the force that pulls objects toward each other

1. a massive cloud of gas and dust where stars are born
2. a group of stars that form a pattern in the night sky
3. a large object that orbits a star and does not make its own light
5. a powerful explosion that occurs when a massive star runs out of fuel
6. a tool that collects light to make distant objects look closer and clearer
8. a huge collection of stars, gas, and dust held together by gravity
9. a region of space with gravity so strong that not even light can escape
11. System the Sun and all objects that orbit it, including planets, moons, and asteroids
12. the hot, dense core left after a star sheds its outer layers
14. a natural object that orbits a planet
16. the stretching of light waves from objects moving away from us, evidence the universe is expanding