It has been known since the time of Copernicus, almost 500 years ago, that the daily and seasonal displacement of the planets and the stars in the night sky is due both to the rotation of the Earth on its tilted axis and to the Earth's revolution around the Sun.
(It; has been known; T:since the time of Copernicus; T:almost 500 years ago) (the daily and seasonal displacement of the planets and the stars in the night sky; is; due both to the rotation of the Earth on its tilted axis and to the Earth's revolution around the Sun)
It the daily and seasonal displacement of the planets and the stars in the night sky
has been known is
T:since the time of Copernicus T:almost 500 years ago
due both to the rotation of the Earth on its tilted axis and to the Earth's revolution around the Sun