Heliacal rising.
Sidereal time.
Take a picture of the stars before the dawn every day.
Just before dawn, while the sky is still dark, and the stars are still out.
Tomorrow, the same thing, just before dawn, while the Earth still blocks the Sun.
Heliacal rising.
Sidereal time.
Take a picture of the stars before the dawn every day.
Just before dawn, while the sky is still dark, and the stars are still out.
Tomorrow, the same thing, just before dawn, while the Earth still blocks the Sun.