Straight rilles are narrow, elongated channels found on the surface of celestial bodies, particularly on the Moon and Mars. These features are typically formed by volcanic activity or tectonic processes, creating linear depressions that can stretch for many kilometers. Their straight appearance distinguishes them from other geological formations. The study of straight rilles helps scientists understand the geological history of the Moon and Mars. By analyzing their formation and characteristics, researchers can gain insights into past volcanic activity and the tectonic movements that shaped these planets. This information is crucial for understanding the evolution of our solar system.