There is no constellation visible every night of the year from the Northern Hemisphere. The Earth's rotation and orbit around the Sun cause different constellations to be visible at different times of the year.

However, there are some constellations that are circumpolar for much of the Northern Hemisphere. This means they never set below the horizon, and therefore are visible year-round. These include:

* Ursa Major (The Great Bear), which includes the asterism known as the Big Dipper

* Ursa Minor (The Little Bear), which contains Polaris, the North Star

* Draco (The Dragon)

* Cepheus (The King)

* Cassiopeia (The Queen)

These constellations are most easily seen in the Northern Hemisphere, but their visibility may depend on your exact latitude.