Final answer:
The correct answer is circumpolar zone . Stars that never rise or set for an observer at a specific latitude are located in the circumpolar zone of the celestial sphere, such as the north circumpolar zone for northern observers, where constellations like the Big Dipper are always visible.
Step-by-step explanation:
Stars which never rise or set are located in the circumpolar zone of the celestial sphere. For an observer at 38° N latitude, the circumpolar zone consists of the parts of the sky near the celestial poles that are always above the horizon, resulting in the stars within these areas making daily circles around the poles without ever setting.
Therefore, for an observer in the Northern Hemisphere, the north circumpolar zone holds star groups such as the Big Dipper, Little Dipper, and Cassiopeia that are always visible. Conversely, in the Southern Hemisphere, there is a south circumpolar zone where certain stars like the Southern Cross never rise for observers located in the continental United States.