Science

2. The natural science that studies celestial objects, space, and the entire universe, applying physics, mathematics, and chemistry to understand their properties, motion, origin, and evolution.
4. The alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon and sun.
6. One of the two times in a year (around March 20-21 and September 22-23) when the Sun's rays strike the Earth's equator directly, resulting in roughly equal lengths of day and night across the globe.
8. The partially shaded outer region of the shadow cast by an opaque object
10. When an object spins on its axis.
11. When an object goes around a bigger object.
13. A celestial event where the Moon passes between the Sun and Earth, casting a shadow on Earth and blocking the Sun from view.

1. The fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.
3. One of the two points in Earth's orbit when the Sun reaches its northernmost or southernmost position at noon, resulting in the longest day and shortest night (summer solstice) or the shortest day and longest night (winter solstice) for a given hemisphere.
5. 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.
7. A tide just after a new or full moon, when there is the greatest difference between high and low water.
9. A tide just after the first or third quarters of the moon when there is least difference between high and low water.
12. A force that attracts a body toward the center of the earth, or toward any other physical body having mass.