地ち心しん視し差さ

noun

geocentric parallax

Technical term in astronomy; the apparent shift of a celestial body's position when observed from the Earth's center versus its surface.

• 月つきの位い置ちを正せい確かくに求もとめるには、地ち心しん視し差さを補ほ正せいする必ひつ要ようがある。

  To accurately determine the Moon's position, it is necessary to correct for geocentric parallax.