Outer Space Crossword Puzzle

1. planet, a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.
4. model, measured from or considered in relation to the centre of the sun.
5. motion, orbit
7. a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure.
8. giant, a large planet of relatively low density consisting predominantly of hydrogen and helium, such as Jupiter, Saturn, Uranus, or Neptune.
9. positioned in or relating to the sky, or outer space as observed in astronomy.
11. move in a circle on a central axis.

2. an expert in or student of astronomy.
3. model, measured from or considered in relation to the centre of the earth
6. movement, or a tendency to move, towards a centre of gravity, as in the falling of bodies to the earth.
10. a celestial body moving in an elliptical orbit round a star.