Latitude
Geographic angular coordinate indicating the north-south position of a point on the Earth’s surface to the equator. Its values range from 0º at the equator to +/-90º at the poles. Wikipedia / Time and Date
Length
Geographic angular coordinate indicating the east-west position of a point on the Earth’s surface to the meridian in Greenwich, London. Its values range from 0º in the Greenwich meridian to +/-180º. Wikipedia / Time and Date
Local or sun midnight
The moment of day when the sun crosses the meridian opposite that of the observer. In places where the midnight sun occurs, it will be the lowest point the sun will pass through in the sky. Time and Date
Lunar apogee
Point of the moon orbit when it is furthest to the Earth. Time and Date
Lunar eclipse
Astronomical event that occurs when the Earth stands between the sun and the moon, creating a shadow of different depth on the lunar surface. Depending on how the shadow hits the moon, the eclipse will be of different type: penumbral, partial and total or complete. Lunar eclipses only occur on full moons. Time and Date
Lunar month
Time required by the moon to pass through all its phases, measured from the new moon to the next. Also known as lunation, the astronomical term for this period is a synodic month. Time and Date
Lunar perigee
Point of the orbit of the moon when it is nearest to the Earth. Time and Date
Lunar phase
The lunar phase is called the moon ratio that is illuminated. This illuminated area changes every moment, even if they are easier to perceive in everyday variations. The lunar month or moon is divided into four primary and four intermediate phases:
- New Moon
- Waxing crescent moon
- First quarter
- Waxing gibbous moon
- Full moon
- Waning gibbous moon
- Third quarter
- Waning crescent moon
Lunation
Time required by the moon to pass through all its phases, measured from the new moon to the next. Also known as lunar month, and the astronomical term for this period is a synodic month. The moons are numbered by different systems, but the most commonly used is Brown’s moon numbering system. Time and Date