Words starting with sidereal

8 letter words starting with sidereal

• sidereal — determined by or from the stars: sidereal time.
• sidereal day — the interval between two successive passages of the vernal equinox over the meridian, being about four minutes shorter than a mean solar day.
• sidereal hour — a 24th part of a sidereal day
• sidereal hour angle — the angle, measured westward through 360°, between the hour circle passing through the vernal equinox and the hour circle of a celestial body.
• sidereal month — Also called calendar month. any of the twelve parts, as January or February, into which the calendar year is divided.