Celebrated twice a year in spring and autumn, Astronomy Day honors the mysteries of the universe. Thanks to astronomy, we understand that Earth is a sphere with a 13,000 km diameter and a 100 km thick atmosphere. The Sun, positioned 150 million km away, lights up the space around us, from nearby planets to comets beyond the Kuiper Belt.

The date of Astronomy Day varies annually as it is linked to the phase of the Moon, making each year's celebration unique. Are you fascinated by the wonders of astronomy?