It is the star directly on your northern horizon. It can be used to determine your longitude on Earth. It is the brightest star in the sky. It appears very near the north celestial pole. A model tries to represent only one aspect of nature.
All current models are correct.
All models that explain nature well are correct. A model tries to represent all aspects of nature. A model can be used to explain and predict real phenomena. A theory is a model designed to explain a number of observed facts. A theory cannot be taken seriously by scientists if it contradicts other theories developed by scientists over the past several hundred years.