[EternalVigilance]

However, the bright surfaces of the two moons surprise astronomers because a variety of external processes should have darkened the surfaces of these moons over time.

They don't dare consider that there hasn't been enough time.

That would be heresy.

[Red Badger]

They have no way of knowing how long the moons have been moons of Pluto. They could have just been added to its retinue a few decades ago, or just before they discovered them.....................