Across
- 1. something rotating around something in apathy of gravity.
- 4. an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination.
- 6. broad dark areas of the moon.
- 7. system various planets orbiting the sun.
- 8. as the Sun reaches its highest or lowest excursion relative to the celestial equator on the celestial sphere.
- 9. the distance of one wave peak to another.
- 13. Is everything.
- 14. the motion of one object around one another.
- 15. a crater made on a planets surface by asteroids/ stalites.
- 16. a place in which astronauts can live in space for long periods of time.
- 17. day when daytime and night are of approximately equal duration.
- 19. a space of partial illumination (as in an eclipse) between the perfect shadow on all sides and the full light.
Down
- 2. a device that gathers electromagnetic radiation.
- 3. Patterns of temperature and change of weather throughout the year.
- 5. the complete or perfect shadow of an opaque body, as a planet, where the direct light from the source of illumination is completely cut off.
- 10. An imaginary line the earth rotates on.
- 11. A craft built to land on a planets surface.
- 12. a group of billions or millions of stars heals together by their own gravity.
- 16. the range of colors spread through a crystal prisim when a light beam shines through it.
- 18. a device that usually orbits a planets atmosphere to measure gasses in orbit.