The Solar System

1. a natural satellite of the Earth, visible at night by reflected light of the sun.
3. a unit of astronomical distance equivalent to the distance that light travels in one year.
4. the star in the middle of the solar system which Earth orbits.
5. the curved path of a celestial object or space craft round a star, planet or moon.
6. a small rocky body orbiting the sun.
8. a celestial object made of ice and dust.
9. a fixed luminous point in the night sky, a large remote incandescent body like the sun.
11. a system of millions or billions of stars, gas and dust held together by gravitational attraction.
12. an artificial body placed in orbit around a planet or star to collect information.

1. a piece of rock or metal that has fallen to Earths surface from outer space.
2. a celestial body moving in an elliptical orbit around the sun.
7. The collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
10. a small body of matter from outer space which enters the Earths atmosphere.
12. A spot or patch that appears from time to time on the sun's surface, appearing dark by contrast with its surroundings. It is a temporary phenomena on the sun's photosphere.