Across
- 4. the time when the Earth rotates and the first rays of sunlight fall on a particular place
- 5. the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth
- 7. a large object that orbits a star
- 9. the emission or transmission of energy in the form of waves or particles through space or through a material medium
- 10. the planet that is sixth in order from the sun and that is surrounded by large rings
- 13. How many high tides does each place have in one day?
- 14. a place in space where gravity pulls so much that even light can not get out
- 16. a G-type main-sequence star that comprises about 99.86% of the mass of the Solar System
- 17. the planet on which we live
- 18. the branch of science which deals with celestial objects, space, and the physical universe as a whole.
Down
- 1. a period of the year when something is best or available
- 2. The force that pulls on the oceans to form the tides
- 3. a new moon and so the moon appears to get bigger every day
- 6. 17. The high tides that are experienced when both the Sun and Moon are on the same side as the earth
- 8. each of the twenty-four-hour periods, reckoned from one midnight to the next, into which a week, month, or year is divided, and corresponding to a rotation of the earth on its axis
- 11. A star positioned along the line in space that includes the axis (see also axis) of rotation of the Earth
- 12. orbit planets and asteroids in our solar system
- 15. the curved path of a celestial object or spacecraft round a star, planet, or moon, especially a periodic elliptical revolution