You updated your password.

Reset Password

Enter the email address you used to create your account. We will email you instructions on how to reset your password.

Forgot Your Email Address? Contact Us

14

Ancient Timekeeping and Calendars

Lecture no. 14 from the course: The Remarkable Science of Ancient Astronomy

Loading the player...

Taught by Professor Bradley E. Schaefer | 31 min | Categories: Science

For ancient people, keeping track of the time of day and year required a detailed understanding of the motions of the Sun, Moon, and stars. See how different cultures solved this problem. Also learn how to use a handy astronomical measuring device called the astrolabe....