Across
- 3. spot or patch that appears from time to time on the sun's surface,
- 4. -the star round which the earth orbits.
- 7. curved path of a celestial object or spacecraft round a star, planet, or moon
- 8. small body of matter from outer space.
- 10. - a piece of rock or metal that has fallen to the earth's surface from outer space as a meteor.
- 11. system -the collection of eight planets and their moons in orbit round the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
- 12. year-a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 million million miles).
- 13. - a system of millions or billions of stars, together with gas and dust, held together by gravity
Down
- 1. natural satellite of the earth, visible by reflected light from the sun.
- 2. celestial body moving in an elliptical orbit round a star.
- 5. -an artificial body placed in orbit round the earth or moon or another planet in order to collect information or for communication.
- 6. celestial object consisting of a nucleus of ice and dust
- 9. small rocky body orbiting the sun.
- 11. -a fixed luminous point in the night sky which is a large,