SPACE-Topic 10

2. a loose collection of ice and dust that orbits the sun, typically in a long, narrow orbit
4. a dark area of gas on the sun’s surface that is cooler than surrounding gases
6. the brilliant explosion of a dying supergiant star
9. an object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit
12. electromagnetic radiation that can be seen with the unaided eye
14. the blue-white hot core of a star that is left behind after its outer layers have expanded and drifted out into space
15. the system consisting of the sun and the planets and other objects that revolve around it
18. a huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity
19. a unit of distance equal to the average distance between Earth and the Sun, about 150 million km
20. a contracting cloud of gas and dust with enough mass to form a star
21. a quality or trait belonging to something or someone

1. a large cloud of gas and dust in space
3. the outer layer of the sun’s atmosphere
5. an optical instrument that forms enlarged images of distant objects
7. all of space and everything in it
8. the distance between two corresponding parts of a wave, such as the distance between two crests
9. a huge, reddish loop of gas that protrudes from the sun’s surface, linking parts of sunspot regions
10. the middle layer of the sun’s atmosphere
11. a stream of electrically charged particles that emanates from the sun’s corona
13. the inner layer of the sun’s atmosphere that gives off its visible light
16. the distance that light travels in one year, about 9.46 trillion km
17. an eruption of gas from the sun’s surface that occurs when the loops in sunspot regions suddenly connect