Identification
The Big Dipper is what astronomers call a circumpolar group of stars, meaning that it exists very close to the celestial North Pole, an imaginary spot in the heavens corresponding to a point directly over the earth̵7;s own North Pole.
Fixed Position
Polaris, in the constellation of Ursa Minor, is the closest star in the night sky to the celestial North Pole. As the earth rotates and the stars appear to move, only Polaris appears to stay in the same place.
Sky Clock
Watch the Big Dipper and it will appear to move counterclockwise around Polaris, almost as if it were the hands of a sky clock.
Geography
According to the space.com website, an observer in American cities at about 30 degrees north latitude, such as Houston and New Orleans, can watch part of the Big Dipper ̶0;set̶1; as it goes below the horizon, only to reappear hours later.
Always Visible
If you are in a place about 35 degrees north and higher, the Big Dipper is visible in its entirety all the time. Look to the north and you will be able to spot it on a clear evening.