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1. EQUINOX
Description: the time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length.
2. SOLSTICE
Description: is the point where the Sun appears to reach either its highest or lowest point in the sky for the year and thus ancient astronomers came to know the day as one where the Sun appeared to stand still.
4. COPERNICUS
Description: Copernicus was a Polish astronomer known as the father of modern astronomy. He was the first modern European scientist to propose that Earth and other planets revolve around the sun, or the Heliocentric Theory of the universe.
5. PLANETARY
Description: the scientific study of planets, celestial bodies and planetary systems and the processes of their formation. It studies objects ranging in size from micrometeoroids to gas giants, aiming to determine their composition, dynamics, formation, interrelations and history.