what is the angle of tilt for the earth's axis
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 on a 41,000-year cycle; the earth's mean obliquity is currently 23 ° 26 ′ 13.1" (or 23.43699 °) and decreasing.