The sun's influence on the remote planet Uranus does not significantly affect its brightness in the sky. Uranus is located much farther from the Sun compared to Earth, at a distance of approximately 2.8 billion kilometers (1.7 billion miles). This vast distance means that the sunlight reaching Uranus is about four times weaker compared to the sunlight reaching Earth.

Since Uranus is farther from the Sun, the amount of sunlight it receives is significantly less. This means that the planet's brightness, as seen from Earth, is not as variable as the brightness of closer planets like Venus or Mars. Uranus' brightness in the sky remains relatively constant throughout its orbit around the Sun.

Additionally, Uranus has a unique rotation axis that is almost parallel to the plane of its orbit. This means that as the planet travels around the Sun, its axis is not tilted towards or away from the Sun like Earth's. This lack of axial tilt results in minimal variations in the planet's brightness due to seasonal changes.

Overall, while the Sun does influence Uranus' brightness, the effect is not substantial. Uranus' brightness variations are primarily caused by changes in its distance and viewing geometry from Earth, rather than the Sun's influence on its surface.