| Because of the precession of the equinoxes the tropical year is shorter by about 21 minutes than the sidereal year. |
| Because of the precession of the equinoxes, the equinox and solstice points have each moved westward about 30 degrees in the last 2,000 years. |
| During the spring and fall equinoxes, the Sun also passes through this plane. |
| The lengths of the hours were equal around the equinoxes but the rest of the time they could vary considerably. |
| These nine nights occur on equinoxes or equal nights when the sun is vertically overhead at the equator or centre. |
| He explained eclipses, solstices and equinoxes, announced the sphericity of the earth and its diurnal revolution on its axis. |
