| A | B |
| day | time required for Earth to rotate once on its axis |
| equinox | when sun is direclty above the equator |
| sostice | sun shines as far north or south of the equator |
| phases of the moon | change in moon's appearance |
| eclipse | shadow of one celestial body falls on another |
| lunar eclipse | Earth is between the sun and moon;Earth's shadow falls on moon |
| solar eclipse | moon is between Earth and sun; moon's shadow falls on Earth-point in orbit closer to Earth |
| annular eclipse | moon at point in orbit that is farther from Earth |
| new moon | 1st in phase; see no moon |
| waxing cresent | see small sliver of moon; getting bigger |
| first quarter | see quarter of moon |
| waxing gibbous | almost see all of moon |
| full moon | see all of moon |
| wanning gibbous | moon getting smaller |
| last quarter | see last quarter of moon |
| wanning cresent | see small sliver of moon |
| waxing | moon (appears to ) get bigger |
| wanning | moon (appears to ) get smaller |