In space, a ray of light will generally hit the equator of a celestial body, such as a planet or moon, at an angle. This is because celestial bodies are generally spherical in shape and the equator is a curved line on their surface.
When light travels from space and approaches a celestial body, it will be affected by the body's gravitational field. As a result, the path of the light will curve slightly as it follows the curvature of the body. This curvature causes the light to approach the equator at an angle rather than perpendicular to the surface.
It's worth noting that the specific angle at which light hits the equator will depend on various factors, such as the distance between the light source and the celestial body, the size and shape of the body, and the strength of its gravitational field. These factors can vary for different celestial bodies, so the angle of incidence at the equator may differ between, for example, a planet and a moon.