the earth axis of rotation is always inclined at an angle of
Axial tilt At an obliquity of zero, the two axes point in the same direction; i.e., the rotational axis is perpendicular to the orbital plane. Earth's obliquity oscillates between 22.1 and 24.5 degrees[2] on a 41,000-year cycle; the earth's mean obliquity is currently 23°26′12.8″ (or 23.4369°) and decreasing.
Rate equation k is the first order rate constant, which has units of 1/s or sâˆ’1.
Prime meridian On Earth, starting at the North Pole and heading south to the South Pole, the IERS Reference Meridian (as of 2016) passes through:
Alonso Álvarez de Pineda