Astronomy Crossword II

6. a large artificial satellite on which people can live and work for long periods of time
7. an object that orbits a planet
8. any stable star that is fusing hydrogen in its core to form helium (like our SUN)
12. a place that is empty of all matter
13. the small, dense remains of a high-mass star
15. an object whose gravity is so strong that nothing, not even light, can escape
16. an optical instrument that forms enlarged images of distant objects

1. all of space and everything in it
2. the initial explosion that resulted in the formation and expansion of the universe
3. the blue-white hot core of a star that is left behind after its outer layers have expanded and drifted out into space
4. the brilliant explosion of a dying supergiant star
5. a huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity
9. the velocity an object must reach to fly beyond a planet's or moon's gravitational pull
10. a device that expels gas in one direction to move in the opposite direction
11. a small robotic space probe that can move about the surface of a planet or moon
14. a ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion