Starry skies refer to the appearance of the night sky when it is filled with visible stars. This phenomenon occurs when the atmosphere is clear and free from light pollution, allowing for a better view of celestial bodies. Stars are massive, luminous spheres of plasma, primarily composed of hydrogen and helium, that emit light and heat through nuclear fusion. Observing starry skies can reveal various constellations, which are patterns formed by groups of stars. Notable constellations include Orion, Ursa Major, and Cassiopeia. Additionally, during certain times of the year, meteor showers can occur, providing a spectacular display of shooting stars across the night sky.