Across
- 4. The most numerous galaxies in the universe are thought to be ~ galaxies.
- 6. movement
- 7. unusual
- 8. As two galaxies ~ in such a collision, gravitational disruptions throw their stars into the chaotic orbits that characterize elliptical galaxies.
- 10. mixture or combination of chemical or biological elements, e.g. “Carbon and oxygen are ~ to form CO2.”
- 11. an important discovery which can lead to great achievement or development.
- 12. Newton’s discoveries were later recorded in his famous book Philosophiae Naturalis Principia Mathematica, widely ~ the most important work of science in history.
- 13. the force that keeps an object moving until it’s stopped by another force
- 14. an object sent into space in order to collect info. or to be part of a communication sys.
- 15. something fine and subtle, easy to be injured.
Down
- 1. to think of something as caused by a particular circumstance
- 2. extremely clever or skillful, ~person, idea, performance…
- 3. the most important element upon which other things depend, affecting the very basic nature of things.
- 5. highly respected and admired by people.
- 9. happening between stars