Across
- 4. the study of the movements and relative positions of celestial bodies
- 6. a system of millions or billions of stars, together with gas and dust
- 7. a small rocky body orbiting the sun
- 9. a celestial body moving in an elliptical orbit round a star.
Down
- 1. 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.
- 2. is the galaxy that contains the Solar System, with the name describing the galaxy's appearance from Earth
- 3. a region of space having a gravitational field so intense that no matter or radiation can escape.
- 5. an optical instrument designed to make distant objects appear nearer
- 8. A massive ball of gas that generates prodigious amounts of energy