PROBLEM II.

_To find the Altitude and Azimuth of the Sun, Moon, and Planets, at any

time of their being above the Horizon._

Turn the Globe till the Index comes to the given time in the Hour

Circle; then keep the Globe steady, and moving the Quadrant of Altitude

to each Planet respectively, the edge of the Ecliptic will cut the

Planet’s mean Altitude on the Quadrant, and the Quadrant will cut the

Planet’s Azimuth, or Point of Bearing on the Horizon.

Astronomy Explained Upon Sir Isaac Newton's Principles And made easy to those who have not studied mathematics · 第 243 / 275 题