At 8pm, you see that the pointer stars of the Big dipper and the star Polaris are arranged in a vertical line. at what time. give or take a minute or so, would you see them arranged at 45 degrees to the vertical?
As the earth rotates, big dipper also seems to circulate around the sky near the north star. When we look at it from ground it appears to us as it is at different angels. They usually complete a full circle once a day in approximately 23 hours.
