Space Crossword

2. A huge collection of stars, gas, dust, and interstellar matter that is all gravitationally bound
7. An object that orbits a planet or something else other than a star
8. Cataclysmic explosion that occurs at the end of a star’s life cycle
10. The theory that Earth is at the center of the universe and all other celestial bodies revolve around it
14. Small, rocky, celestial body found orbiting the sun
15. All of space and time, their contents (matter and energy) included
17. The gravitationally bound system of the sun and everything that orbits around it
19. The four planets in our solar system that orbit between the sun and the asteroid belt
20. The theory of how the universe began, how it started with an indefinitely hot and dense single point that inflated and stretched

1. The collapsed core of a massive star, it is born when thze massive star dies in a supernova
3. The layers and mixtures of gases surrounding a planet or another celestial body
4. A region of spacetime where gravity is so strong that no matter or radiation can escape
5. Streams of energized, charged particles flowing outward from the Sun’s corona
6. A measurement of the distance a beam of light travels in one Earth year
9. A name for a pattern or grouping of stars that look like a particular shape in the night sky
11. An enormous cloud of dust and gas filling up the space between stars, where new stars are born
12. Often looking like a streak of light due to iridescence caused by friction, it is a space rock that enters the Earth’s atmosphere
13. The barred spiral galaxy containing our solar system
16. The action of an object’s spinning motion about its own axis
18. A unit of measurement that is roughly the distance from the center of the Earth to the center of the sun