Which constellation contains the oldest star cluster in the Northern Hemisphere?

The constellation that contains the oldest star cluster in the Northern Hemisphere is indeed Cepheus, which houses the well-known star cluster NGC 188. This cluster is estimated to be around 6-7 billion years old, making it one of the oldest known star clusters.

Cepheus, named after a king in Greek mythology, is located near the northern celestial pole, allowing for visibility in various seasons from northern latitudes. The stars in this cluster have low metallicity, indicating their ancient formation, which contributes to the understanding of the early universe and the formation of stars.

In contrast, while other constellations like Draco, Canis Major, and Lyra contain notable star clusters and stars, they do not present objects that surpass NGC 188 in age or significance in the context of ancient star clusters in the Northern Hemisphere. Understanding this context is key when identifying the characteristics of various celestial objects and their historical importance in astronomy.