No, a bright light that remains static in the sky for a number of consecutive nights is not necessarily a satellite. While satellites can appear as bright lights in the sky, they typically move across the sky in a predictable manner due to their orbital motion around the Earth.
There are other celestial objects that can appear as bright, stationary lights in the sky. For example, planets such as Venus and Jupiter are often visible as bright "evening stars" or "morning stars" depending on their position relative to the Sun. These planets can be easily observed for several consecutive nights without significant apparent movement.
Other possibilities include stars that are relatively close to Earth and have a high apparent brightness, such as Sirius or Vega. These stars may appear as bright points of light that remain relatively stationary in the night sky over multiple nights.
Additionally, atmospheric phenomena like certain types of clouds or even certain astronomical events like supernovae or novae can create bright lights that appear stationary for a period of time.
To determine whether a bright light in the sky is a satellite or another celestial object, you can consider factors such as its motion across the sky over time, its brightness compared to surrounding objects, and any additional characteristics like flashing lights or changing colors.