Across
- 2. the natural satellite of the earth, visible (chiefly at night) by reflected light from the sun
- 5. an artificial body placed in orbit round the earth or moon or another planet in order to collect information or for communication.
- 6. the amount of time light can travle in a year
- 8. any of the dark spots that appear at times on the sun's surface and are usually visible only through a telescope.
- 9. a celestial object consisting of a nucleus of ice and dust and, when near the sun, a ‘tail’ of gas and dust particles pointing away from the sun.
- 10. an area of activity, interest, or influence.
- 11. a celestial body moving in an elliptical orbit round a star.
- 12. the star round which the earth orbits.
Down
- 1. a fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
- 2. a small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light.
- 3. A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity
- 4. a piece of rock or metal that has fallen to the earth's surface from outer space as a meteor. Over 90 per cent of meteorites are of rock while the remainder consist wholly or partly of iron and nickel.
- 7. a small rocky body orbiting the sun. Large numbers of these, ranging enormously in size, are found between the orbits of Mars and Jupiter.
- 8. the collection of eight planets and their moons in orbit round the sun