Astronomy

2. eclipse- An eclipse in which the sun is obscured by the moon.
4. The point in the orbit of the moon or a satellite at which it is nearest to the earth.
7. The time or date (twice each year) at which the sun reaches its maximum or minimum declination, marked by the longest and shortest days
8. The shadow cast by the earth or moon over an area experiencing a partial eclipse.
9. eclipse- An eclipse of the sun in which the edge of the sun remains visible as a bright ring around the moon.
14. revolution-The object's orbital motion around another object.
16. The point in the orbit of a planet, asteroid, or comet at which it is closest to the sun.
17. The dark central part of a sunspot.
18. An imaginary line around the middle of a planet or other celestial body.

1. The moment or duration of total obscuration of the sun or moon during an eclipse.
3. eclipse- An eclipse in which the moon appears darkened as it passes into the earth's shadow.
5. rotation- An object's spinning motion about its own axis.
6. Half of a spherical or roughly spherical body (such as a planet).
10. Measures the distance north or south of the equator.
11. An event in which a planet's subsolar point passes through its Equator.
12. The point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun.
13. The point in the orbit of the moon or a satellite at which it is furthest from the earth.
15. tilt- The angle between the planet's rotational axis and its orbital axis.