Astronomy Vocabulary

4. A tide just after the first or third quarters of the moon when there is least difference between high and low water
6. The outer part of a shadow cast by a celestial body where the light from the Sun is partially blocked
7. Angular distance from the ecliptic of a point on the celestial sphere
10. How long an object takes to spin around another object
12. The rotation of an object that always shows the same face to an object that it is orbiting
13. A tide just after a new or full moon, when there is the greatest difference between high and low water

1. Angular distance from a point on the celestial sphere that is perpendicular to the ecliptic at the point of a vernal equinox
2. The appearance of a celestial body's state of illumination
3. The periodic rise and fall of the ocean level from the gravitational force exerted by the Moon and Sun
5. How long an object takes to spin around its axis
8. A shadow darkest,central part,where light is completely excluded
9. Occurs when Earth passes between the Sun and Moon, with Earth casting its shadow on the Moon
11. Occurs when the Moon passes between the Sun and Earth, with the Moon casting its shadow on Earth