Question

Over the course of a night, suppose you are observing two stars that you label as Star A and Star B. The coordinates of Star A are RA = 9^h 00^m 0^s, DEC = 0˚ 0¢ 0¢¢ and the coordinates of Star B are RA = 11^h 20^m 0^s, DEC = 0˚ 0¢ 0¢¢. On that night, Star A passes through the zenith at 12:15 A.M. local time. At what time will Star B pass through the zenith? Explain your answer.

Answer 1

It is given that star A 12:15 AM. passes Zenith at Now & earth rotates from west to east direction Star B will be at Zenith after ahrs com. i.e t= 12:15 AM + ahe.com at 2:35 AM a time at which star B will pass through the zenith.