赤せき道どう傾けい斜しゃ角かく

noun

axial tilt; obliquity

Technical term in astronomy for the angle between a planet's rotational axis and its orbital plane.

• 地ち球きゅうの赤せき道どう傾けい斜しゃ角かくは約やく23.4度どです。

  Earth's axial tilt is about 23.4 degrees.