The heliacal rising of Sirius marked the beginning of the Egyptian calendar.
Гелиакальный восход Сириуса ознаменовал начало египетского календаря.
Definitionen
Relating to or near the sun, especially referring to the rising or setting of a star or planet when it is close to the sun.
The heliacal rising of Sirius was an important event in ancient Egyptian astronomy.
Designating the first visible rising of a celestial body at dawn, or its last visible setting at dusk, after a period of invisibility caused by its proximity to the Sun.
Ancient farmers watched for the heliacal rising of Venus to mark the start of the planting season.