No planet can shine without the sun. Planets are celestial bodies that orbit stars and reflect light from their host star.

Here's why:

* Planets do not have their own internal source of light: They are not stars, which produce light through nuclear fusion.

* They reflect sunlight: Planets are visible to us because they reflect sunlight. The amount of light reflected depends on their size, composition, and distance from the sun.

If a planet were to shine without a star, it would have to be a star itself.